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 human organ filters waste from the blood?
A) Heart
B) Liver
C) Kidney
D) Lung
✅ Correct Answer: C
Explanation: Kidneys filter blood to form urine.
Q: Which is the longest bone in the human body?
A) Radius
B) Tibia
C) Femur
D) Humerus
✅ Correct Answer: C
Explanation: The femur, or thigh bone, is the longest and strongest.
Q: Which disease is caused by deficiency of insulin?
A) Scurvy
B) Asthma
C) Cancer
D) Diabetes
✅ Correct Answer: D
Explanation: Diabetes is caused by insufficient insulin production or action.
Q: What is the function of platelets?
A) Transport nutrients
B) Carry oxygen
C) Fight infection
D) Blood clotting
✅ Correct Answer: D
Explanation: Platelets help in forming blood clots.
Q: What is the normal pH of human blood?
A) 8.5
B) 7.4
C) 6.0
D) 5.5
✅ Correct Answer: B
Explanation: A pH of 7.4 is slightly alkaline and optimal for body function.