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500 REAL EXAM QUESTIONS AND CORRECT VERIFIED
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Question 1
What is the normal gestation period for a mouse (Mus
musculus)?
A. 16–17 days
B. 19–21 days
C. 28–32 days
D. 60–65 days
Correct Answer: B
Rationale: Mice have a gestation period of approximately 19–
21 days (average 20 days). Rats are 21–23 days, hamsters 16
days, guinea pigs 68 days.
Question 2
What is the normal body temperature range for an adult
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,rabbit?
A. 36.0–37.5°C (96.8–99.5°F)
B. 38.5–40.0°C (101.3–104.0°F)
C. 37.5–39.0°C (99.5–102.2°F)
D. 35.0–36.5°C (95.0–97.7°F)
Correct Answer: B
Rationale: Rabbits have a normal temperature of 38.5–40.0°C
(101.3–104.0°F). Mice/rats 36-38°C, humans 37°C.
Question 3
Which of the following is a characteristic of a Sprague-Dawley
rat?
A. Albino, outbred stock used widely in toxicology
B. Hairless, immunodeficient
C. Pigmented, inbred strain
D. Long-haired, used for dermatology
Correct Answer: A
Rationale: Sprague-Dawley is a common outbred albino rat
used in toxicology, pharmacology, and general research. Wistar
and Long-Evans are also common.
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,Question 4
What is the average heart rate of a normal adult mouse?
A. 100–150 beats per minute
B. 250–350 beats per minute
C. 500–700 beats per minute
D. 1000–1200 beats per minute
Correct Answer: C
Rationale: Mice have a very high heart rate (500–700 bpm).
Rats: 300–500 bpm, rabbits: 150–300 bpm, dogs: 60–140
bpm.
Question 5
What is the average daily water consumption for a typical
adult rat?
A. 5–10 mL/day
B. 20–40 mL/day
C. 50–70 mL/day
D. 100–150 mL/day
Correct Answer: B
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, Rationale: Adult rats (250-400g) drink approximately 20-40
mL/day (about 80-100 mL/kg/day). Mice drink 4-7 mL/day.
Question 6
Which sex of rat has a greater anogenital distance (AGD)?
A. Female (shorter AGD)
B. Male (longer AGD)
C. Both are equal
D. Depends on strain
Correct Answer: B
Rationale: Male rats have a distinctly longer anogenital distance
(distance between anus and genital papilla) compared to
females. This is used for sexing.
Question 7
What is the normal lifespan of a C57BL/6 mouse under
standard laboratory conditions?
A. 6–12 months
B. 18–24 months
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