2025 cycle: 582 posts (458 ARS); NET and prelims 12-13 Nov 2025; mains 1 Mar 2026 (secondary). ARS eligibility (Master's vs PhD) is unverified because sources conflict. The official site asrb.org.in was unreachable, so this row relies on a coaching site.
Original questions written to this exam's published syllabus and pattern. Not past papers.
1. Glucose absorption by the sodium-glucose cotransporter (SGLT) in the intestine and proximal tubule is an example of:
Facilitated diffusion down the glucose concentration gradient
Secondary active transport driven by the sodium gradient
Receptor-mediated endocytosis
Primary active transport using ATP hydrolysed by the carrier itself
Answer and working
B. Secondary active transport driven by the sodium gradient
SGLT uses the downhill movement of sodium, whose gradient is built by the Na+/K+-ATPase, to move glucose uphill. It does not hydrolyse ATP itself, so it is secondary, not primary, active transport.
Veterinary Physiology I: Body Fluids, Blood, Circulation, Respiration and Excretion · Cellular basis of physiology
2. Which domestic mammal has no gall bladder?
Dog
Pig
Ox
Horse
Answer and working
D. Horse
The horse (like the rat) lacks a gall bladder and secretes bile continuously into the duodenum, which suits its near-continuous feeding. Dog, pig and ox all have a gall bladder that CCK contracts after a meal.
Veterinary Physiology II: Digestion, Muscle, Nerve, Endocrinology, Reproduction, Lactation, Growth and Climate · Digestion in monogastric animals
3. A weak acid buffer has pKa 4.76. What is the pH when the ratio of conjugate base to acid is 10:1?
3.76
4.76
5.76
14.76
Answer and working
C. 5.76
Henderson-Hasselbalch: pH = pKa + log10([A-]/[HA]) = 4.76 + log10(10) = 4.76 + 1 = 5.76. Inverting the ratio gives 3.76; forgetting the log term gives 4.76; adding 10 instead of log10(10) gives 14.76.
Veterinary Biochemistry · Biomolecules and their interactions
4. Which enzyme copies an RNA template into complementary DNA?
RNA polymerase II
DNA ligase
Reverse transcriptase
Taq DNA polymerase
Answer and working
C. Reverse transcriptase
Reverse transcriptase, first found in retroviruses, synthesises cDNA from RNA; this is the first step of RT-PCR and of cDNA library construction. RNA polymerase II does the reverse (DNA to RNA), and ligase only joins existing strands.
Veterinary and Animal Biotechnology · Molecular biology and recombinant DNA
5. Daily milk yields in litres of seven cows are 8, 12, 9, 15, 10, 11, 30. What is the median yield?
11 litres
13.57 litres
15 litres
12 litres
Answer and working
A. 11 litres
Ordered: 8, 9, 10, 11, 12, 15, 30; the 4th of 7 values is 11. 13.57 is the mean, pulled up by the 30-litre cow; 15 is the middle of the unsorted list.
Biostatistics, Computer Application & Research Methodology · Measures of central tendency
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