OPSC PCS VAS 2018 PAPER 1-Animal Science

Results

QUIZ START

#1. A pullet is technically defined as a young female:

Turkey

Duck

Chicken

Quail

#2. Perosis (Slipped tendon) in growing poultry chicks is caused primarily by the nutritional deficiency of:

Calcium

Phosphorus

Manganese

Iron

#3. The average egg weight of a Japanese quail (Coturnix japonica) is approximately:

10 g

15 g

20 g

25 g

#4. The primary source of energy utilized by the developing chick embryo during the final phase of incubation is derived from:

Yolk sac lipids

Carbohydrate stores

Protein catabolism

Amniotic fluid

#5. Cereal maize (corn) grain is notoriously deficient in which two essential amino acids for poultry and swine?

Methionine and Lysine

Methionine and Arginine

Lysine and Arginine

Lysine and Tryptophan

#6. In an idealized population, family selection cannot be superior to individual (mass) selection if the:

Heritability of the trait is low

Selection intensity is exceptionally high

Heritability of the trait is high (family basis is not larger than individual basis)

Families are extremely large

#7. Vaccination against Ranikhet Disease (Newcastle Disease) in commercial poultry can be administered via:

Intramuscular injection

Intraperitoneal injection

Subcutaneous injection

All of the above parenteral routes

#8. According to historical global livestock production statistics, the rank of India in total egg production was:

8th

6th

5th

3rd / 4th

#9. In the avian oviduct, the dense egg albumen is synthesized and secreted by the:

Infundibulum

Magnum

Isthmus

Uterus (Shell gland)

#10. The pre-ovulatory surge of Luteinizing Hormone (LH) from the anterior pituitary in laying hens causes:

Release of a mature yolk (ovulation)

Development of the oviduct

Increase in blood ionized calcium

Normal shell deposition

#11. Thyroid hormones in avian physiology fundamentally influence:

Basal metabolic rate of the bird

Feather growth, structure, and pigmentation

Both metabolic rate and feather development

Oviposition timing alone

#12. The tandem method of selection is preferred over independent culling levels when:

Genetic correlations between the selected traits are highly desirable and positive

Phenotypic correlations between traits are negative

There is no correlation between the traits

Selection intensity is low

#13. Family selection is the selection method of choice for quantitative traits characterized by:

Low heritability (h2 < 0.15)

High heritability

Expression restricted to both sexes equally

Extremely small family size

#14. Proof that additive genetic variance still exists in a population that has apparently reached a selection limit is demonstrated if:

There is a significant response to reverse selection

The population phenotypic mean remains permanently constant

Realized heritability remains exactly constant

There is complete elimination of phenotypic variance

#15. Which of the following is NOT a necessary characteristic of the base lines chosen for reciprocal recurrent selection (RRS)?

Lines differ substantially in initial gene frequencies

Lines already exhibit near-maximum inbred performance

Lines are partially inbred

Lines exhibit superior combining ability

#16. The theoretical and practical superiority of a selection index in multi-trait selection largely depends upon the accuracy of:

Estimating only the heritability of the primary trait

Estimating phenotypic and genetic variances and covariances among all traits

Assigning equal economic weights to all traits

Estimating maternal repeatability

#17. The effective population size (Ne) under pedigreed random breeding with unequal numbers of males (M) and females (F) is expressed as:

1/Ne = 1/(4M) + 1/(4F)

1/Ne = 3/(16M) + 1/(16F)

1/Ne = 3/(32M) + 1/(32F)

1/Ne = 1/(8M) + 1/(8F)

#18. The ultimate direction and goal of selection can be consciously defined and manipulated under:

Artificial selection practiced by animal breeders

Natural evolutionary selection alone

Both artificial and natural selection equally

Random genetic drift

#19. Which of the following carbohydrates is an oligosaccharide rather than a polysaccharide?

Raffinose (Trisaccharide)

Dextrins

Inulin

Cellulose

#20. In birds and terrestrial reptiles, the primary end-product of protein and nitrogen catabolism is:

Uric acid

Allantoin

Urea nitrogen

Nitrate nitrogen

#21. Which of the following is NOT classified chemically as a basic amino acid?

Arginine

Valine (Branched-chain neutral amino acid)

Histidine

Lysine

#22. Which of the following fatty acids is classified as a polyunsaturated fatty acid rather than a saturated fatty acid?

Palmitic acid

Arachidic acid

Stearic acid

Arachidonic acid (PUFA with 4 double bonds)

#23. Which ultra-trace mineral element has been recognized in modern nutrition as an essential cofactor for insulin (Glucose Tolerance Factor)?

Zinc

Cobalt

Chromium

Selenium

#24. Which of the following lipid classes is non-glycerol based (does not contain a glycerol backbone)?

Lecithins

Cephalins

Triolein

Steroids (Cholesterol / Sterols)

#25. What is the principal non-protein nitrogenous (NPN) component present in lush green berseem (Trifolium alexandrinum) herbage?

Ammonia Nitrogen

Amide Nitrogen

Amino Nitrogen

Nitrate Nitrogen

#26. Which B-complex vitamin is essential for the prevention of perosis (slipped tendon) and fatty liver syndrome in poultry chicks?

Choline

Biotin

Folic acid

Pantothenic acid

#27. Who was the pioneering Austrian monk who first unraveled the fundamental laws of biological inheritance and heredity?

Charles Darwin

Thomas Hunt Morgan

Gregor Johann Mendel

James Watson

#28. The expression of mahogany versus red coat color in Ayrshire cattle represents a classical textbook example of:

Sex-influenced inheritance

Sex-limited inheritance

Sex-linked inheritance

Cytoplasmic maternal inheritance

#29. The earliest historically documented spontaneous case of mutation in livestock (Ancon short-legged sheep) was discovered in a:

Drosophila fly

Garden pea plant

Male lamb (Ram lamb born to Seth Wright)

Neurospora fungus

#30. Recurrent selection with a tester line in animal and plant breeding is practiced primarily to utilize and accumulate:

Dominance deviations

Additive genetic variance

Non-additive genetic variance (Overdominance and Epistasis)

Environmental variance

#31. Mass phenotypic selection is most rapid and effective for quantitative traits that are predominantly governed by:

Dominant gene action

Overdominance

Epistatic gene action

Additive gene action

#32. Sib selection in dairy cattle breeding is especially recommended for evaluating traits that exhibit:

Sex-linked inheritance

Sex-limited expression (such as milk yield)

Sex-influenced inheritance

Complete maternal dominance

#33. When epistatic non-additive gene interactions are important for juvenile growth rate in broilers, the breeding method of choice is:

Recurrent Selection

Pedigree selection

Reciprocal Recurrent Selection (RRS)

Tandem mass selection

#34. The biological phenomenon wherein a single gene exerts multiple distinct, seemingly unrelated phenotypic effects is called:

Penetrance

Expressivity

Pleiotropy

Epistasis

#35. Opposite to the phenomenon of inbreeding depression is the expression of hybrid vigour, which is scientifically termed:

Heterosis

Supplementary effect

Additive variance

Multiplicative effect

#36. Under continuous close full-sib (brother-sister) inbreeding, the inbreeding coefficient (F) reaches 0.500 (50%) after how many generations?

2 generations

3 generations

4 generations

5 generations

#37. In statistical hypothesis testing, the error committed by mistakenly rejecting a true null hypothesis (H0) is a:

Type-I error (Alpha error)

Type-II error (Beta error)

Standard error

Sampling bias

#38. Among the following domestic species, which animal has the highest diploid chromosome number (2n = 78)?

Pig (2n = 38)

Horse (2n = 64)

Camel (2n = 74)

Dog (2n = 78)

#39. The commercial culinary meat obtained from domestic water buffalo (Bubalus bubalis) is designated as:

Beef

Carabeef

Mutton

Chevon

#40. Which dairy livestock species contributes the largest percentage share to the total national milk production in India?

Goat

Water Buffalo

Zebu Cattle

Sheep

#41. The average normal gestation period in the domestic cow and water buffalo is approximately:

310 days and 282 days

282 days and 310 days

336 days and 250 days

150 days and 310 days

#42. The normal physiological rectal body temperature range of healthy adult dairy cattle is:

100.4°F to 102.5°F (approx. 101.5°F)

98.4°F to 99.5°F

103.5°F to 105.0°F

105.5°F to 107.0°F

#43. Among domestic farm animals, which species exhibits the highest normal resting pulse / heart rate (70-120 beats/min)?

Horse (28-40 bpm)

Adult cattle (40-60 bpm)

Adult pig (60-80 bpm)

Small dog / Poultry (high resting rate)

#44. Under normal conditions, one millilitre of good-quality raw bull semen contains approximately how many spermatozoa?

500 million

1000 to 1500 million (approx. 1200 million/ml)

2500 million

3000 million

#45. In high-yielding dairy cows, silent heat (subestrus without behavioral manifestation) most commonly occurs during which period postpartum?

10 to 13 days

15 to 18 days

25 to 30 days

60 days and beyond

#46. The average age of attaining physiological sexual maturity (puberty) in well-nourished dairy cattle is approximately:

6 to 9 months

1 to 1.5 years

2 to 2.5 years (2-3 years)

4 to 5 years

#47. Among commercial farm livestock and poultry species, the feed conversion efficiency (FCR) is maximum (most efficient) in:

Beef cattle

Commercial broiler poultry

Fattening pigs

Camels

#48. In agricultural economics, the enterprise system of ‘Mixed Farming’ fundamentally incorporates:

Crop production alone

Animal production alone

Integration of crop production with livestock production

Multiple cropping without livestock

#49. Which river basin serves as the richest and most biodiverse freshwater fish capture resource in India?

Yamuna River

Chambal River

Ganga River system

Narmada River

#50. In the early mammalian embryo and fetus, the developing skeleton is composed primarily of:

Dense compact bone only

Hyaline cartilage and mesenchymal connective tissue

Mineralized cancellous bone

Elastic cartilage only

#51. Which dense fibrous connective tissue structure connects bone to bone across a synovial joint?

Ligament

Tendon (connects muscle to bone)

Aponeurosis

Synovial membrane

#52. In the ruminant stomach, the primary physiological function of the omasum is the absorption of:

Mineral salts only

Insoluble fibers

Water, bicarbonate, and residual volatile fatty acids (VFAs)

Proteins and amino acids

#53. Which recognized Indian buffalo breed is noted for producing milk with the highest average fat percentage (approx. 8% to 12%)?

Murrah

Bhadawari

Mehsana

Nagpuri

#54. The Government of India Central Cattle Breeding Farm (CCBF) for the Tharparkar breed is located at:

Suratgarh (Rajasthan)

Jaisalmer

Sirsa

Hisar

#55. The prestigious national institute ‘ICAR – National Dairy Research Institute’ (NDRI) is situated at:

Izatnagar (Bareilly)

Karnal (Haryana)

New Delhi

Ludhiana

#56. Which mating system is most commonly and reliably practiced in controlled experimental breeding farms?

Artificial insemination with pedigree recording

Flock mating

Pen mating

Hand mating system (individual supervised mating)

#57. Sheep are capable of extremely close grazing of short pasture vegetation primarily because of their:

Small narrow muzzle

Upper incisor structure

Split upper lip (philtrum) and mobile lips

Flattened molar teeth

#58. What is the average daily drinking water requirement for an adult sheep under tropical conditions?

2 litres/day during winter

3.5 to 4 litres/day during hot summer

2 to 3 litres for every 1 kg of dry matter consumed

All of the above seasonal requirements

#59. Chevon (goat meat) derived from which prominent Indian indigenous goat breed is renowned for being exceptionally tender and delicious?

Black Bengal

Nubian

Chegu

Marwari

#60. Is the behavioral phenomenon of ‘gestational estrus’ (heat exhibition during pregnancy) observed in goats?

Yes (observed occasionally in does)

No (strictly impossible)

Only in aged animals

Only in nulliparous does

#61. Which major milk lipid fraction contributes most directly to the rich creamy mouthfeel and delicate flavour of whole milk?

Milk phospholipids and fat globule membrane lipids

Galactolipids

Glycolipids

Free cholesterol

#62. In commercial pork carcass butchery, the primal cut designated as ‘Ham’ is obtained from the:

Back and loin

Belly and bacon side

Shoulder and Boston butt

Hind leg and rear quarter

#63. Secondary nutritional deficiencies and clinical metabolic disorders occur with higher frequency in which livestock group?

Monogastric swine

Extensively grazed ruminants

Intensively fed high-producing ruminants

Pack camels

#64. The commercially rendered and clarified white edible fat obtained from a slaughtered pig carcass is known as:

Gammon

Lard

Ham

Tallow

#65. Under proper hygienic milking technique, the maximum vacuum pressure applied during mechanical milking should be maintained around:

25-40 mm Hg

350-380 mm Hg (or hand milking pressure: 25-50 mm Hg)

15-20 mm Hg

60-80 mm Hg

#66. The average normal specific gravity of pure, fresh bovine whole milk at 15°C is approximately:

0.940

1.000

1.028 to 1.032 (approx. 1.030)

1.050

#67. Which exotic European dairy cattle breed exhibits the highest adaptability and tolerance to hot tropical climates?

Holstein Friesian

Jersey (small body size and lower metabolic heat)

Ayrshire

Brown Swiss

#68. Which intracellular biophysical ratio is considered the primary physiological trigger for initiating mitotic cell division?

Cytoplasmic index

Karyoplasmic (Nucleo-cytoplasmic) index

Mitochondrial volume ratio

Total protein mass

#69. In meiosis I, genetic crossing-over and reciprocal recombination occur physically between:

Sister chromatids of the same chromosome

Non-sister chromatids of homologous chromosomes

Non-homologous autosomes

Centromeric heterochromatin

#70. Which specialized form of nuclear cell division takes place only once in the entire life cycle of a sexually reproducing germ cell?

Amitosis

Meiosis

Mitosis

Endoreduplication

#71. In which phase of nuclear cell division does cytological crossing-over (chiasma formation) take place?

Mitotic prophase

Prophase I of Meiosis (Pachytene sub-stage)

Prophase II of Meiosis

Anaphase of Mitosis

#72. What fundamental genetic event occurs during meiotic crossing-over between homologous chromosomes?

Duplication of chromosomal segments

Tight non-exchange linkage

Gross deletion of chromatin

Reciprocal exchange of genetic material between non-sister chromatids

#73. What is the primary evolutionary significance of spontaneous genetic mutations in biological populations?

Promoting absolute reproductive isolation

Generating novel genetic variation and raw material for natural selection

Accelerating random genetic drift

Stabilizing chromosome number

#74. An aneuploid chromosomal complement characterized by the addition of two extra homologous chromosomes (2n + 2) is termed a:

Nullisomic condition (2n - 2)

Double trisomic condition (2n + 1 + 1)

Tetrasomic condition (2n + 2)

Pentasomic condition (2n + 3)

#75. Chemical mutations induced by the base analogue 5-bromouracil (5-BU) typically result in:

Transversion mutations (purine pyrimidine)

Transition mutations (AT GC base pair transitions)

Frameshift insertions/deletions

Large chromosomal inversions

#76. Which specialized class of bacterial enzymes acts as molecular scissors to cut double-stranded DNA at palindromic recognition sites?

DNA ligases

Deoxyribonucleases (DNases)

Restriction endonucleases

Amylases

#77. If a carrier female whose father was color-blind (XCXc) marries a normal male (XCY), what percentage of their sons will be color-blind?

100% of sons

25% of sons

50% of sons

0% of sons

#78. The sum total of all unique genes and alleles present in an interbreeding Mendelian population is termed the:

Genotype

Phenotypic distribution

Karyotype

Gene pool

#79. A complete, catalytically active enzyme consisting of an apoenzyme protein bound to its non-protein prosthetic cofactor is a:

Coenzyme

Proenzyme (Zymogen)

Holoenzyme

Apoenzyme alone

#80. A broken chromosome fragment or aberration that completely lacks a centromere is termed:

Monocentric chromosome

Dicentric chromosome

Acentric fragment

Polycentric chromosome

#81. A standardized diagrammatic representation of the chromosome complement of an organism aligned by size and morphology is an:

Cladogram

Cryptogram

Idiogram (Karyogram)

Phenogram

#82. Mitotic cell division can naturally take place in which ploidy level of eukaryotic cells?

Haploid cells

Diploid cells

Polyploid cells

All of the above ploidy levels

#83. During normal meiotic synapsis, what is the absolute minimum number of chiasmata formed between a pair of homologous chromosomes?

One chiasma

Two chiasmata

Three chiasmata

Four chiasmata

#84. During the eukaryotic cell cycle, chromatin exhibits the absolute minimum condensation and coiling during:

Mitotic Prophase

Mitotic Metaphase

Mitotic Anaphase

Interphase (G1/S/G2)

#85. In honeybee (Apis mellifera) society, drones are biologically produced by arrhenotokous parthenogenesis and are:

Sterile worker females

Sterile non-reproductive males

Fertile queens

Fertile haploid males

#86. Among common nitrogenous excretory wastes produced by animals, which compound is the least toxic and requires minimal water for excretion?

Ammonia

Urea

Uric acid

Trimethylamine oxide

#87. In an Analysis of Variance (ANOVA), the calculated variance ratio (F-statistic) is mathematically formulated to be:

Always less than zero

Calculated as greater mean square divided by lesser mean square (typically > 1.0)

Strictly equal to zero

A negative ratio

#88. In population genetics, which mating system is most efficient for rapidly increasing homozygosity and fixing desirable traits?

Inbreeding (Close inbreeding)

Outbreeding

Rotational crossbreeding

Random panmixia

#89. Wright’s inbreeding coefficient (F) provides a direct quantitative measure of the proportional increase in:

Population homozygosity

Population heterozygosity

Environmental variance

Mutation rate

#90. A systematic breeding programme wherein non-descript native females are repeatedly backcrossed to purebred superior sires for several generations is:

Crossbreeding

Linebreeding

Outcrossing

Grading up

#91. The revolutionary ‘Operon Model’ of gene regulation in prokaryotes was proposed in 1961 by:

Gregor Mendel and Charles Darwin

Hugo de Vries and H. J. Muller

Stanley Miller and Harold Urey

Francois Jacob and Jacques Monod

#92. Hermann Joseph Muller was awarded the Nobel Prize for his monumental discovery that X-rays artificially induce:

Phenotypic selection

Heritable genetic mutations

Directed migration

Cytoplasmic inheritance

#93. Common cultivated bread wheat (Triticum aestivum) with a somatic chromosome number of 2n = 6x = 42 is an:

Allotetraploid

Triploid

Octaploid

Allohexaploid

#94. In mammals, the normal heterogametic sex-determining chromosomes in females and males are respectively:

XX in females and XY in males

XY in females and XX in males

ZW in females and ZZ in males

XO in females and XX in males

#95. Dr. Har Gobind Khorana was jointly awarded the 1968 Nobel Prize in Physiology or Medicine for his seminal contributions to deciphering the:

Oral contraceptive mechanism

Structure of polypeptide hormones

Genetic code and its translation in protein synthesis

Clonal selection theory of immunology

#96. Which indigenous Indian poultry breed native to Madhya Pradesh is famous for its black-pigmented meat, bones, and internal organs?

Aseel

Tellicherry

Kadaknath (Kalamasi)

Busra

#97. The rare double-humped domestic Bactrian camel (Camelus bactrianus) in India is found exclusively in the cold high-altitude desert of:

Thar Desert, Rajasthan

Rann of Kutch, Gujarat

Nubra Valley, Ladakh

Spiti Valley, Himachal Pradesh

#98. The world-famous, ultra-fine luxury fiber ‘Pashmina’ is harvested from which domestic animal?

Angora rabbit (produces Angora wool)

Changthangi / Chegu Pashmina goat

Karakul fur sheep

Bactrian camel

#99. In pregnant dairy cattle, supplementary pregnancy feeding allowance (steaming up) should routinely begin:

During the last trimester (at 6 to 7 months of gestation)

At 8.5 months of gestation only

Immediately after artificial insemination (3 months)

Only after parturition

#100. The mammalian liver possesses the metabolic machinery to synthesize glycogen and glucose, but cannot synthesize:

Starch (plant polysaccharide)

Glucose from lactate

Glycogen from glucose-6-phosphate

Urea from ammonia

#101. The enzymes and carrier complexes of the Tricarboxylic Acid (TCA / Krebs) cycle are localized within the:

Mitochondrial matrix

Microsomes

Cytosol

Peroxisomes

#102. In hepatic and muscle glycogenolysis, the enzyme Glycogen Phosphorylase a catalyzes the phosphorolytic breakdown of:

Glucose to fructose

Fructose to glucose

Glycogen to glucose-1-phosphate

Glucose to lactate

#103. An increased intracellular concentration of NADPH (reducing equivalents from HMP shunt) strongly stimulates and favors the de novo biosynthesis of:

Saturated fatty acids (via Fatty Acid Synthase complex)

Unsaturated fatty acids

Glycogen granules

Ketone bodies

#104. Dietary plant starch (amylose and amylopectin) is enzymatically hydrolyzed into maltose and dextrins by:

Alpha-Amylase

Glycogen phosphorylase

Hexokinase

Cellulase

#105. In the mammalian testis, the principal androgen hormone Testosterone is synthesized and secreted by the:

Germinal spermatogonia

Interstitial Leydig cells

Sustentacular Sertoli cells

Tunica albuginea fibroblasts

#106. Surgical castration (bilateral orchiectomy) of a male calf results in the permanent loss of:

Penile erection capability

Sperm ejaculation capability

Sexual libido and aggressive male behavior

All of the above reproductive functions

#107. A small amount of basal progesterone secretion in female reproduction is required for:

Maintenance of corpus luteum

Maintaining a non-contractile, quiescent state of the myometrium

Ovulation

None of the above

#108. In laboratory rodents (rats and mice), which anterior pituitary luteotropic hormone is responsible for maintaining the functional corpus luteum?

Follicle Stimulating Hormone (FSH)

Luteinizing Hormone (LH)

Prolactin (Luteotropic Hormone / LTH)

Adrenocorticotropic Hormone (ACTH)

#109. During pubertal and gestational mammogenesis, the steroid hormone Estrogen is primarily responsible for stimulating:

Ductal and tubular elongation and branching

Lobulo-alveolar secretory tissue differentiation

Development of the milk cistern and teat

Immediate galactopoiesis

#110. The pelvic autonomic and vagus nerves supplying parasympathetic innervation to the pelvic genitalia carry fibers that are functionally:

Motor

Sensory

Mixed (carrying both afferent sensory and efferent motor fibers)

Purely sympathetic

#111. A dairy cow exhibiting continuous, intense estrus behavior and persistent bulling at frequent, irregular intervals is suffering from:

Nymphomania (due to persistent cystic Graafian follicles)

Split estrus

Silent heat

Nutritional anestrus

#112. In clinical biochemistry, the pathological ketone bodies accumulating during severe ketosis and ketoacidosis include:

Acetoacetic acid

Acetone

Beta-hydroxybutyric acid

All of the above three compounds

#113. The total volume of protein-free plasma fluid filtered per minute by all the glomeruli of both kidneys combined is termed the:

Glomerular Filtration (GF)

Glomerular Filtration Rate (GFR)

Filtration Fraction (FF)

Renal Plasma Clearance

#114. From a biochemical and pharmacological perspective, all animal hormones are categorized chemically as being:

Carbohydrate polymers

Minerals and fatty acids

Vitamins or purines

Peptides/proteins, amino acid derivatives, or steroids

#115. Amino acids that cannot be synthesized endogenously by the animal tissues in adequate amounts and must be supplied in the diet are:

Non-essential amino acids

Essential (Indispensable) amino acids

Semi-essential amino acids

Limiting glucogenic amino acids

#116. In non-ruminant and ruminant digestive physiology, the principal physiological function of the large intestine (colon) is:

Active absorption of water, volatile fatty acids, and electrolytes from digesta

Secretion of proteolytic digestive enzymes

Digestion of dietary lipids by bile acids

Production of hydrochloric acid

#117. The thick, nutrient-rich seminal plasma secretion produced by the seminal vesicles (vesicular glands) is characteristically:

Slightly alkaline, rich in fructose and citric acid

Acidic and destructive to spermatozoa

Devoid of energy substrates

Pure water with high sodium chloride

#118. Which of the following chemical substances is a pro-coagulant rather than an in vitro blood anticoagulant?

Heparin sodium

Sodium oxalate

Calcium chloride (CaCl2 provides essential Ca2+ for clotting)

Disodium EDTA

#119. In the domestic mare, spontaneous ovulation does not occur over the general ovarian surface, but occurs exclusively at the:

Cortex border

Hilum

Ovulation fossa (Fossa ovulatoria)

Tunica albuginea margin

#120. The electrogenic Na+/K+-ATPase pump embedded in the neuronal axonal membrane actively maintains the resting intracellular Na+ concentration at approximately:

5 mEq/L

10 to 14 mEq/L

142 mEq/L

150 mEq/L

#121. Successful non-surgical embryo transfer and pregnancy establishment in a recipient cow depends critically on:

The developmental stage and viability of the donor embryo

Strict synchronization between embryonic age and recipient uterine environment

Sufficient circulating maternal progesterone concentrations

All of the above management and physiological factors

#122. In the normal neuroendocrine cascade of ruminant parturition, the fetal cortisol-induced cascade results in:

A surge of maternal PGF2alpha that regresses the corpus luteum, preceding the surge of oxytocin

Oxytocin release preceding the release of prostaglandin F2alpha

Complete absence of oxytocin until days postpartum

Immediate prolactin withdrawal

#123. The preoptic and anterior hypothalamic nuclei contain thermoregulatory centers that functionally orchestrate:

Increased cutaneous vasodilation and heat loss in hot environments

Decreased metabolic heat production

Shivering and thermogenesis in cold environments

All of the above autonomic thermoregulatory responses

#124. Acute environmental cold stress in farm animals triggers an immediate compensatory neuroendocrine surge in the secretion of:

Epinephrine and norepinephrine from the adrenal medulla

Glucocorticoids from the adrenal cortex

Thyroxine (T4) and triiodothyronine (T3) from the thyroid gland

All of the above thermogenic hormones

#125. Pathological hypersecretion of which mineralocorticoid hormone causes renal H+ and K+ wasting, resulting in metabolic alkalosis?

Growth hormone

Cortisol

Aldosterone (Conn's syndrome)

Vasopressin

#126. Which gonadotropic preparation is most widely utilized clinically to induce superovulation in mares and donor heifers?

Equine Chorionic Gonadotropin (eCG / PMSG) or porcine FSH

Human Chorionic Gonadotropin (hCG)

Synthetic stilbestrol

Prolactin

#127. The non-steroidal peptide hormone Inhibin, which exerts negative feedback on pituitary FSH secretion, is secreted in the male by:

Leydig cells

Sertoli cells (Sustentacular cells)

Epididymal epithelial cells

Seminal vesicle epithelium

#128. Endocrine glands are anatomically and physiologically distinguished by being:

Ductless glands that secrete hormones directly into the bloodstream

Exocrine glands with branched ducts

Holocrine sebaceous structures

Avascular glandular clusters

#129. Inactive pancreatic trypsinogen is cleaved and activated into active Trypsin in the duodenal lumen by the brush-border enzyme:

Pancreozymin (CCK)

Carboxypeptidase

Enterokinase (Enteropeptidase)

Carbonic anhydrase

#130. The peptide hormone Oxytocin is biosynthesized within the cell bodies of the paraventricular and supraoptic nuclei of the:

Basal ganglia

Hypothalamus (stored in posterior pituitary)

Medulla oblongata

Cerebellar cortex

#131. Renal tubular sodium reabsorption and potassium excretion are stimulated under the direct hormonal control of:

Aldosterone (from adrenal cortex)

Antidiuretic hormone

Oxytocin

Calcitonin

#132. The normal physiological urine of healthy adult herbivorous cattle and sheep is characteristically:

Strongly acidic (pH < 6.0)

Alkaline (pH 7.4 to 8.4) due to herbivorous diet

Strictly neutral (pH 7.00)

Highly variable and acidic

#133. Which compartment of the ruminant stomach is colloquially referred to as the ‘pouch’ or ‘water pouch’?

Rumen

Reticulum

Omasum

Abomasum

#134. Under normal roughage feeding, the average anatomical length of mature bovine ruminal papillae is approximately:

0.5 to 1.0 cm (approx. 1 cm)

10 cm

100 cm

20 cm

#135. In functional, unoxidized oxyhemoglobin (Hb4O8), the essential iron atom in each heme prosthetic group exists in the:

Ferric state (Fe3+)

Ferrous state (Fe2+)

Ferrate state (Fe4+)

Elemental metallic state (Fe0)

#136. Under normal resting conditions at sea level, the partial pressure of Oxygen (pO2) in systemic arterial blood is approximately:

48 mm Hg

46 mm Hg

40 mm Hg

50 mm Hg

#137. The normal erythrocyte cell membrane is freely permeable to water and bicarbonate, but is relatively impermeable to:

Inorganic cations (Na+ and K+)

Small lipid-soluble molecules

Dissolved oxygen gas

Carbon dioxide

#138. The normal resting respiratory rate of an adult healthy dairy cow is approximately how many breaths per minute?

12 to 30 breaths/min (approx. 20-26 bpm)

36 breaths/min

45 breaths/min

60 breaths/min

#139. The abnormal clinical sign characterized by a bluish or purplish discoloration of the skin and mucous membranes is termed:

Melanosis

Cyanosis (due to excessive deoxygenated hemoglobin)

Jaundice (Icterus)

Erythema

#140. Renal blood flow and autoregulation of systemic blood pressure are modulated by the juxtaglomerular apparatus through the:

Renin-Angiotensin-Aldosterone System (RAAS)

Medullary prostaglandin pathway

Sympathetic epinephrine release

All of the above integrated systems

#141. In the normal microbial fermentation of the bovine rumen, methane gas (CH4) constitutes what percentage of total rumen gases?

25% to 35% (approx. 25-30%)

65%

#142. In normal rumen gas composition, Carbon Dioxide (CO2) is the most abundant gas, typically comprising what percentage?

60% to 65% (approx. 65%)

25%

#143. In healthy adult water buffaloes, the total viable ciliate protozoal count per millilitre of rumen liquor is approximately:

1 x 10^4

2 x 10^5 to 11 x 10^5

1 x 10^7

1 x 10^9

#144. The normal commensal microflora inhabiting the rumen of healthy ruminants predominantly consists of:

Gram-negative and Gram-positive strict obligate anaerobes

Spore-forming aerobic bacilli

Facultative microaerophiles

All of the above bacterial types

#145. Post-mortem mammalian skeletal muscle possesses its absolute highest Water Holding Capacity (WHC) during the:

Full rigor mortis state

Immediate pre-rigor state (before ATP depletion and actomyosin cross-linking)

Post-rigor resolving phase

Thaw-rigor state

#146. When insoluble native fibrous collagen is gently heated in water to 80°C, it undergoes thermal denaturation and:

Remains completely insoluble and rigid

Precipitates as insoluble keratin

Is hydrolytically converted into soluble gelatin

Degrades into free amino acids immediately

#147. In flexible food packaging, dead-soft aluminum foil with superior folding and dead-fold retention characteristics belongs to:

'O' temper (Fully annealed foil)

'H-12' temper

'H-14' temper

'H-18' full hard temper

#148. Under historical PFA and modern FSSAI dairy product standards, the maximum permissible limit for added diacetyl flavor in butter is:

4.0 ppm

5.0 ppm

2.0 ppm

Nil (Strictly prohibited in Desi Butter)

#149. Which of the following synthetic food antioxidants is legally permitted for addition to commercial ghee in India?

Butylated Hydroxyanisole (BHA)

Formaldehyde

Mercuric chloride

Benzoic acid

#150. Foodborne Salmonellosis caused by Salmonella enterica serovars is classified toxicologically and clinically as an:

Infectious type of bacterial food poisoning

Non-infectious chemical intoxication

Toxico-infection / Intoxication from preformed enterotoxin

Physical food adulteration

#151. The crude protein content of poultry white breast meat, on an as-is fresh tissue basis, is typically:

Slightly higher than that of dark red meat

Significantly lesser than red meat

Equal to red meat

Completely devoid of essential amino acids

#152. Compared to pork and poultry, which livestock meat has an inherently firmer texture due to lower moisture and higher connective tissue density?

Pork

Chevon (Adult goat meat)

Broiler meat

Rabbit meat

#153. Among common domesticated slaughter animal carcasses, the absolute maximum percentage of total carcass fat is found in:

Carabeef

Beef

Pork (Market swine)

Rabbit meat

#154. As per statutory Bureau of Indian Standards (BIS) specifications, the maximum permissible Standard Plate Count (SPC) for pasteurized milk is:

Zero per ml

100 per ml

30,000 per ml (Grade A pasteurized)

1,00,000 per ml

#155. Controlled mild acid treatment and partial hydrolysis of dermal collagen during commercial extraction produces:

Type A Gelatin

Type B Gelatin

Insoluble elastin

Reticulin fibrils

#156. Fresh, well-bloomed, oxygenated lean beef muscle characteristically exhibits which distinct meat color?

Pale pink

Greyish white

Bright cherry-red (Oxymyoglobin)

Dark brownish-purple

#157. The undesirable dull brownish discoloration of stored fresh meat that has oxidized upon exposure to light is caused by the pigment:

Oxyhemoglobin

Oxymyoglobin

Metmyoglobin (Fe3+)

Nitrosomyoglobin

#158. Post-mortem meat is physically firmer and more resistant to mechanical deformation:

In older, mature animals compared to young animals

During and immediately after chilling (fat crystallization)

Both in older animals and during refrigeration chilling

In neonatal animals

#159. Under proper commercial refrigerated cold chain conditions (0°C to 2°C), the extended shelf-life of barrier vacuum-packaged fresh lamb cuts is:

10 days

2 weeks

3 weeks

8 to 10 weeks (50-70 days)

#160. In traditional meat curing terminology, an aqueous curing solution containing dissolved sodium chloride, sodium nitrite, and sugar is called:

Saltpetre

Dry cure mix

Pickle (Curing brine)

Sweet pickle only

#161. In the traditional wood-smoking process of cured meat products, which chemical smoke fractions exert the primary bactericidal and preservative effect?

Formaldehyde and phenolic compounds

Polycyclic aromatic hydrocarbons

Carbon dioxide and steam

Wood ash particles

#162. In thermal processing and sterilization of foods, which form of heat is significantly more microbiologically lethal and effective at equivalent temperatures?

Moist heat (saturated steam)

Dry hot air

Infrared heat

Microwave radiation

#163. An extrachromosomal, autonomously replicating circular double-stranded DNA element found naturally in bacteria is a:

Cosmid

Bacteriophage

Plasmid

Transposon

#164. Which of the following biological reagents is an essential prerequisite component for carrying out a Polymerase Chain Reaction (PCR)?

DNA ligase

Synthetic oligonucleotide DNA primers

Endonuclease

Reverse transcriptase alone

#165. Monoclonal antibodies that specifically recognize a single unique epitope on an antigen are produced by:

Mixed polyclonal B-cells

A single hybridoma cell clone

Activated killer T-cells

Spleen macrophages

#166. In standard prokaryotic and eukaryotic protein synthesis, the universal initiating ‘start’ codon on mRNA is:

UGA (Stop codon)

AUG (coding for Methionine / N-formylmethionine)

GAU

UUA

#167. A standard indirect Enzyme-Linked Immunosorbent Assay (ELISA) test fundamentally requires which essential diagnostic components?

Antigen, primary antibody, enzyme-labeled conjugate, chromogenic substrate, and microtiter plate

Antigen and primary antibody only

Substrate and buffer only

Agarose gel matrix

#168. Which pioneering scientists were awarded the Nobel Prize for inventing Hybridoma Technology to produce monoclonal antibodies?

Kary Mullis and Michael Smith

Alfred Hershey and Martha Chase

Rolf Zinkernagel and Peter Doherty

Georges Kohler and Cesar Milstein (1975)

#169. In the canonical Watson-Crick B-DNA double-helix model, the number of nucleotide base pairs per complete 360-degree helical turn is:

10 (approx. 10.4 to 10.5 base pairs)

#170. At physiological pH 7.4, the dicarboxylic amino acid Glutamic acid carries a net negative charge, so during electrophoresis it migrates towards the:

Cathode (negative electrode)

Anode (positive electrode)

Remains stationary at the origin

Migrates towards both poles

#171. To achieve optimal electrophoretic separation of the basic amino acids Lysine (pI 9.7) and Histidine (pI 7.6), the buffer pH should be approximately:

pH 2.0

pH 4.0

pH 8.0

pH 12.0

#172. The initial catabolic biochemical step in the general metabolic degradation of most dietary amino acids is:

Deamination (Transamination followed by oxidative deamination)

Hydrogenation

Direct amination

Decarboxylation

#173. In the standard Watson-Crick B-DNA structural model, the fixed spatial distance between the C-1′ carbons of the two deoxyribose sugars across any base pair is:

1.1 nm (10.85 Angstroms)

2.1 nm

3.4 nm

Variable depending on base composition

#174. In a standard Polymerase Chain Reaction (PCR) amplification reaction, how many distinct sequence-specific oligonucleotide primers are required?

One single primer

Two primers (one forward primer and one reverse primer)

Four primers

Five primers

#175. In classical Mendelian genetics, the modified phenotypic segregation ratio observed in the viable progeny of a monohybrid cross involving a recessive lethal gene is:

8:1

4:1

2:1 (instead of 3:1)

1:1

#176. Short, transient nascent segments of lagging-strand DNA synthesized during semi-conservative replication are known as:

Watson-Crick fragments

Okazaki fragments (discovered by Reiji Okazaki)

Peterson fragments

Klenow fragments

#177. In the de novo purine nucleotide biosynthetic pathway, carbon atoms C-4 and C-5 and nitrogen atom N-7 of the purine ring are donated intact by:

Valine

Alanine

Glycine

Serine

#178. In eukaryotic protein synthesis, the translation termination ‘stop’ or nonsense signals on mRNA include all of the following EXCEPT:

UAG (Amber)

UAA (Ochre)

UGA (Opal)

AUG (Initiator codon)

#179. Low-molecular-weight salt and buffer contaminants can be selectively removed from a purified macromolecular protein solution using:

Coarse gravity filtration

Membrane Dialysis against buffer

Solvolysis

Organic solvent extraction

#180. Which of the following standard amino acids has a hydrogen atom as its side-chain (R-group) and completely lacks a chiral (asymmetric) alpha-carbon center?

Glycine

L-Serine

L-Threonine

L-Tryptophan

#181. The nationwide Community Development Programme (CDP) was officially launched for rural community upliftment in India in:

Early 1940s

Early 1950s (October 2, 1952)

Early 1960s

Early 1970s

#182. Under modern rural development administrative nomenclature, the frontline extension post formerly designated as Village Level Worker (V.L.W.) is termed:

Village Livestock Officer (V.L.O.)

Village Development Officer (V.D.O.)

Rural Development Officer (R.D.O.)

Panchayat Secretary

#183. For long-term fixed capital and land improvement loans, small and marginal Indian farmers do NOT depend upon:

Government institutional schemes

Primary Cooperative Agricultural and Rural Development Banks

Local unorganized moneylenders

Primary Agricultural Credit Societies (PACS - provide short-term credit)

#184. Formulating the integrated five-year development plans for a district and coordinating the activities of all Panchayat Samitis is the statutory function of the:

Gram Panchayat

Block Pramukh

Zila Parishad (District Council)

Block Development Officer (BDO)

#185. A well-conceived and comprehensive rural development programme should be structurally designed to address:

Immediate short-term operational contingencies

Unforeseen emergent local crises

Sustainable long-term socio-economic transformations

All of the above temporal needs

#186. The first State Agricultural University (SAU) established in independent India was inaugurated in 1960 at:

PAU, Ludhiana (Punjab)

HAU, Hisar (Haryana)

ANGRAU, Hyderabad (Andhra Pradesh)

Govind Ballabh Pant University of Agriculture and Technology (GBPUAT), Pantnagar (Uttarakhand/UP)

#187. An effective and sound agricultural extension educational programme must be:

Flexible and adaptive to changing grassroots needs

Rigid and standardized across all regions

Authoritarian and non-modifiable

Centralized without local consultation

#188. The historic ‘Gurgaon Experiment’ (1920) which introduced the revolutionary concept of appointing a ‘Village Guide’ in every village was initiated by:

Rabindranath Tagore

Govind Ballabh Pant

Mahatma Gandhi

Frank Lugard Brayne (F. L. Brayne)

#189. The Government of India launched the landmark ‘Special Livestock Production Programme’ (SLPP) during the financial year:

1974-75 (Fifth Five-Year Plan)

1979-80

1978-79

1981-82

#190. The highest national apex body responsible for macro-policy formulation and approval of Five-Year Plans for rural development in India was the:

National Development Council (NDC)

Planning Commission / NITI Aayog

Commission for Agricultural Costs and Prices (CACP)

Ministry of Panchayati Raj

#191. In communication technology and extension teaching media, Television is classified as an:

Audio-visual mass instructional medium

Purely visual silent device

Audio-only medium

Individualized contact medium

#192. A family structure wherein one husband is simultaneously married to multiple wives is sociologically termed a:

Polyandrous family

Polygynous family

Matriarchal nuclear family

Extended joint family

#193. A traditional family system wherein lineage, descent, and ancestral property inheritance pass exclusively from father to son (male to male) is a:

Nuclear family

Combined stem family

Patrilineal family

Matrilineal family

#194. A structured network of interconnected individuals and social units bound together to achieve a common collective purpose is a:

Client system

Cooperative enterprise

Commutative group

Social system

#195. The cognitive and psychological process by which an individual receives, organizes, and interprets sensory stimuli from their environment is:

Fidelity

Perception

Communication feedback

Communication gap

#196. Field tests conducted on farmers’ own lands under local agro-climatic conditions to evaluate the feasibility of a newly developed technology are:

Adaptive on-farm research trials

Mini-kit verification trials

Laboratory determining trials

Both Adaptive research trials and Mini-kit trials

#197. In the innovation-decision process (Rogers), the conscious decision of an individual NOT to adopt or continue an innovation is termed:

Implementation

Rejection (Active or Passive rejection)

Persuasion

Discontinuance

#198. Which of the following visual educational instructional media is NOT classified as a printed/written publication method of extension teaching?

Chalkboard (Blackboard - non-projected display aid)

Extension bulletin

Folded leaflet

Informational pamphlet

#199. In the adopter categorization scheme (Rogers), traditional, past-oriented individuals who are the last to adopt or never adopt an innovation are:

Early adopters

Early majority

Late majority

Laggards

#200. The second phase of the world’s largest dairy development programme, ‘Operation Flood II’, was officially launched in India in:

1970 (Phase I)

1978 / 1981 (Phase II)

1985 (Phase III)

1996

Finish