AAVSB PAVE QUALIFYING SCIENCE
EXAMINATION (QSE) PRACTICE EXAM
QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE
1. Which nerve is primarily responsible for the motor innervation of the muscles that extend
the carpus and digits in the canine forelimb?
A. Median nerve
B. Ulnar nerve
C. Musculocutaneous nerve
D. Radial nerve
Answer: D
Conceptual Explanation: The radial nerve innervates the extensors of the elbow, carpus,
and digits. Damage to this nerve typically results in an inability to extend the limb and a
dropped elbow appearance.
2. In the ruminant, which volatile fatty acid (VFA) is the primary precursor for
gluconeogenesis?
A. Acetate
B. Butyrate
,C. Propionate
D. Lactate
Answer: C
Conceptual Explanation: Propionate is the only VFA that can be converted to glucose via
the succinate pathway in the liver of ruminants, providing the majority of their blood
glucose.
3. What is the mechanism of action of Enrofloxacin, a commonly used fluoroquinolone in
veterinary medicine?
A. Inhibition of 30S ribosomal subunits
B. Interference with cell wall synthesis
C. Inhibition of DNA gyrase (topoisomerase II)
D. Disruption of cell membrane permeability
Answer: C
Conceptual Explanation: Fluoroquinolones like enrofloxacin target bacterial DNA gyrase
and topoisomerase IV, preventing DNA supercoiling and synthesis.
4. Which of the following is a characteristic feature of Type I hypersensitivity reactions?
A. IgG mediated cytotoxic response
B. IgE mediated mast cell degranulation
C. T-cell mediated delayed response
, D. Immune complex deposition
Answer: B
Conceptual Explanation: Type I hypersensitivity involves IgE antibodies binding to mast
cells and basophils, leading to the release of inflammatory mediators like histamine upon
allergen exposure.
5. Ethylene glycol toxicity primarily causes acute renal failure due to the formation of which
crystals in the renal tubules?
A. Struvite
B. Urate
C. Calcium oxalate monohydrate
D. Cystine
Answer: C
Conceptual Explanation: The metabolism of ethylene glycol leads to oxalic acid, which
binds with calcium to form calcium oxalate crystals that damage renal tubular epithelium.
6. The ‘Sweeney’ condition in horses, characterized by atrophy of the supraspinatus and
infraspinatus muscles, is caused by damage to which nerve?
A. Axillary nerve
B. Long thoracic nerve
C. Subscapular nerve
EXAMINATION (QSE) PRACTICE EXAM
QUESTIONS AND DETAILED
SOLUTIONS LATEST UPDATE
1. Which nerve is primarily responsible for the motor innervation of the muscles that extend
the carpus and digits in the canine forelimb?
A. Median nerve
B. Ulnar nerve
C. Musculocutaneous nerve
D. Radial nerve
Answer: D
Conceptual Explanation: The radial nerve innervates the extensors of the elbow, carpus,
and digits. Damage to this nerve typically results in an inability to extend the limb and a
dropped elbow appearance.
2. In the ruminant, which volatile fatty acid (VFA) is the primary precursor for
gluconeogenesis?
A. Acetate
B. Butyrate
,C. Propionate
D. Lactate
Answer: C
Conceptual Explanation: Propionate is the only VFA that can be converted to glucose via
the succinate pathway in the liver of ruminants, providing the majority of their blood
glucose.
3. What is the mechanism of action of Enrofloxacin, a commonly used fluoroquinolone in
veterinary medicine?
A. Inhibition of 30S ribosomal subunits
B. Interference with cell wall synthesis
C. Inhibition of DNA gyrase (topoisomerase II)
D. Disruption of cell membrane permeability
Answer: C
Conceptual Explanation: Fluoroquinolones like enrofloxacin target bacterial DNA gyrase
and topoisomerase IV, preventing DNA supercoiling and synthesis.
4. Which of the following is a characteristic feature of Type I hypersensitivity reactions?
A. IgG mediated cytotoxic response
B. IgE mediated mast cell degranulation
C. T-cell mediated delayed response
, D. Immune complex deposition
Answer: B
Conceptual Explanation: Type I hypersensitivity involves IgE antibodies binding to mast
cells and basophils, leading to the release of inflammatory mediators like histamine upon
allergen exposure.
5. Ethylene glycol toxicity primarily causes acute renal failure due to the formation of which
crystals in the renal tubules?
A. Struvite
B. Urate
C. Calcium oxalate monohydrate
D. Cystine
Answer: C
Conceptual Explanation: The metabolism of ethylene glycol leads to oxalic acid, which
binds with calcium to form calcium oxalate crystals that damage renal tubular epithelium.
6. The ‘Sweeney’ condition in horses, characterized by atrophy of the supraspinatus and
infraspinatus muscles, is caused by damage to which nerve?
A. Axillary nerve
B. Long thoracic nerve
C. Subscapular nerve
