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: Which part of the plant conducts water?
A) Phloem
B) Root hairs
C) Stomata
D) Xylem
✅ Correct Answer: D
Explanation: Xylem transports water from roots to leaves.
Q: Which disease is caused by a virus?
A) Malaria
B) AIDS
C) Typhoid
D) Tuberculosis
✅ Correct Answer: B
Explanation: AIDS is caused by the Human Immunodeficiency Virus (HIV).
Q: Which enzyme breaks down starch?
A) Lipase
B) Pepsin
C) Protease
D) Amylase
✅ Correct Answer: D
Explanation: Amylase converts starch into sugar in the mouth.
Q: Which hormone regulates blood sugar?
A) Estrogen
B) Adrenaline
C) Thyroxine
D) Insulin
✅ Correct Answer: D
Explanation: Insulin lowers blood glucose levels.
Q: What is the function of red blood cells?
A) Fight infection
B) Carry oxygen
C) Clot blood
D) Digest food
✅ Correct Answer: B
Explanation: RBCs carry oxygen via hemoglobin.