Biology MCQs
Biology MCQs cover cell biology, botany, zoology, genetics, microbiology, and physiology. Ideal for MDCAT, CSS, PMS, FPSC, and PPSC exams, they boost conceptual clarity and analytical skills for academic and competitive success.
Q: What is the function of stomata?
A) Water absorption
B) Seed germination
C) Gas exchange
D) Photosynthesis
✅ Correct Answer: C
Explanation: Stomata allow exchange of gases in plant leaves.
Q: What is the function of the large intestine?
A) Digest proteins
B) Break down fats
C) Filter blood
D) Absorb water
✅ Correct Answer: D
Explanation: The large intestine absorbs water and forms feces.
Q: Which part of the eye controls the amount of light entering?
A) Pupil
B) Iris
C) Cornea
D) Retina
✅ Correct Answer: B
Explanation: The iris adjusts the size of the pupil to control light.
Q: Which hormone regulates sleep-wake cycles?
A) Estrogen
B) Insulin
C) Melatonin
D) Cortisol
✅ Correct Answer: C
Explanation: Melatonin helps regulate circadian rhythms.
Q: What does DNA stand for?
A) Dextrose Nucleic Acid
B) Dynamic Nucleic Acid
C) Dual Nitrogen Acid
D) Deoxyribonucleic Acid
✅ Correct Answer: D
Explanation: DNA carries genetic instructions.