AAVSB PAVE FOR VETERINARIANS
QSE - QUALIFYING SCIENCE
COMPREHENSIVE EXAM QUESTIONS
AND DETAILED SOLUTIONS LATEST
UPDATE
1. Which cranial nerve is responsible for the motor innervation of the muscles of mastication?
A. Cranial Nerve V (Trigeminal)
B. Cranial Nerve VII (Facial)
C. Cranial Nerve IX (Glossopharyngeal)
D. Cranial Nerve XII (Hypoglossal)
Answer: A
Conceptual Explanation: The mandibular branch of the Trigeminal nerve (CN V) provides
motor innervation to the muscles of mastication, while the Facial nerve (CN VII) handles
muscles of facial expression.
2. In the cardiac cycle, what does the P-wave on an electrocardiogram represent?
A. Ventricular depolarization
B. Atrial depolarization
C. Atrial repolarization
,D. Ventricular repolarization
Answer: B
Conceptual Explanation: The P-wave corresponds to the electrical activation
(depolarization) of the atria, which precedes atrial contraction.
3. Which enzyme serves as the rate-limiting step in the process of gluconeogenesis?
A. Pyruvate kinase
B. Hexokinase
C. Phosphofructokinase-1
D. Fructose-1,6-bisphosphatase
Answer: D
Conceptual Explanation: Fructose-1,6-bisphosphatase is the key regulatory enzyme in
gluconeogenesis, reversing the step performed by PFK-1 in glycolysis.
4. Which mechanism of action is characteristic of aminoglycoside antibiotics?
A. Inhibition of cell wall synthesis
B. Disruption of the bacterial cell membrane
C. Binding to the 30S ribosomal subunit to inhibit protein synthesis
D. Inhibition of DNA gyrase
Answer: C
, Conceptual Explanation: Aminoglycosides (like gentamicin) bind to the 30S subunit,
causing mRNA misreading and inhibition of protein synthesis, unlike Beta-lactams which
target the cell wall.
5. What type of necrosis is most commonly associated with hypoxic injury in the central
nervous system?
A. Coagulative necrosis
B. Caseous necrosis
C. Liquefactive necrosis
D. Fat necrosis
Answer: C
Conceptual Explanation: Liquefactive necrosis is typical in CNS infarctions because the
brain contains little protein and high lipid/lysosomal content, leading to rapid enzymatic
digestion.
6. In the nephron, where is the majority of filtered glucose reabsorbed?
A. Loop of Henle
B. Proximal convoluted tubule
C. Distal convoluted tubule
D. Collecting duct
Answer: B
QSE - QUALIFYING SCIENCE
COMPREHENSIVE EXAM QUESTIONS
AND DETAILED SOLUTIONS LATEST
UPDATE
1. Which cranial nerve is responsible for the motor innervation of the muscles of mastication?
A. Cranial Nerve V (Trigeminal)
B. Cranial Nerve VII (Facial)
C. Cranial Nerve IX (Glossopharyngeal)
D. Cranial Nerve XII (Hypoglossal)
Answer: A
Conceptual Explanation: The mandibular branch of the Trigeminal nerve (CN V) provides
motor innervation to the muscles of mastication, while the Facial nerve (CN VII) handles
muscles of facial expression.
2. In the cardiac cycle, what does the P-wave on an electrocardiogram represent?
A. Ventricular depolarization
B. Atrial depolarization
C. Atrial repolarization
,D. Ventricular repolarization
Answer: B
Conceptual Explanation: The P-wave corresponds to the electrical activation
(depolarization) of the atria, which precedes atrial contraction.
3. Which enzyme serves as the rate-limiting step in the process of gluconeogenesis?
A. Pyruvate kinase
B. Hexokinase
C. Phosphofructokinase-1
D. Fructose-1,6-bisphosphatase
Answer: D
Conceptual Explanation: Fructose-1,6-bisphosphatase is the key regulatory enzyme in
gluconeogenesis, reversing the step performed by PFK-1 in glycolysis.
4. Which mechanism of action is characteristic of aminoglycoside antibiotics?
A. Inhibition of cell wall synthesis
B. Disruption of the bacterial cell membrane
C. Binding to the 30S ribosomal subunit to inhibit protein synthesis
D. Inhibition of DNA gyrase
Answer: C
, Conceptual Explanation: Aminoglycosides (like gentamicin) bind to the 30S subunit,
causing mRNA misreading and inhibition of protein synthesis, unlike Beta-lactams which
target the cell wall.
5. What type of necrosis is most commonly associated with hypoxic injury in the central
nervous system?
A. Coagulative necrosis
B. Caseous necrosis
C. Liquefactive necrosis
D. Fat necrosis
Answer: C
Conceptual Explanation: Liquefactive necrosis is typical in CNS infarctions because the
brain contains little protein and high lipid/lysosomal content, leading to rapid enzymatic
digestion.
6. In the nephron, where is the majority of filtered glucose reabsorbed?
A. Loop of Henle
B. Proximal convoluted tubule
C. Distal convoluted tubule
D. Collecting duct
Answer: B
