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 gland controls growth?
A) Adrenal
B) Thyroid
C) Pancreas
D) Pituitary
✅ Correct Answer: D
Explanation: The pituitary gland releases growth hormone.
Q: Which blood vessels carry blood away from the heart?
A) Veins
B) Nerves
C) Arteries
D) Capillaries
✅ Correct Answer: C
Explanation: Arteries transport oxygenated blood from the heart.
Q: What is the main function of white blood cells?
A) Carry nutrients
B) Form clots
C) Carry oxygen
D) Fight infection
✅ Correct Answer: D
Explanation: WBCs defend the body against pathogens.
Q: Which mineral is important for healthy bones?
A) Iodine
B) Iron
C) Zinc
D) Calcium
✅ Correct Answer: D
Explanation: Calcium strengthens bones and teeth.
Q: What is the main excretory organ in humans?
A) Liver
B) Skin
C) Lungs
D) Kidneys
✅ Correct Answer: D
Explanation: Kidneys filter and excrete nitrogenous waste.