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 process do plants use to make food?
A) Respiration
B) Fermentation
C) Photosynthesis
D) Digestion
✅ Correct Answer: C
Explanation: Plants convert light energy into chemical energy through photosynthesis.
Q: How many chromosomes are in human body cells?
A) 46
B) 23
C) 22
D) 44
✅ Correct Answer: A
Explanation: Humans have 46 chromosomes (23 pairs) in somatic cells.
Q: Which macromolecule is the main source of energy?
A) Nucleic acid
B) Carbohydrate
C) Protein
D) Lipid
✅ Correct Answer: B
Explanation: Carbohydrates are broken down to glucose for energy.
Q: Which organ filters waste from the blood?
A) Liver
B) Lungs
C) Kidney
D) Spleen
✅ Correct Answer: C
Explanation: Kidneys remove waste and regulate fluid balance.
Q: What is the fluid part of blood called?
A) Plasma
B) Serum
C) Platelets
D) Hemoglobin
✅ Correct Answer: A
Explanation: Plasma is the liquid part that carries cells and nutrients.