Biology MCQs
Biology MCQs are a vital tool for students preparing for medical entrance exams like MDCAT, as well as competitive tests like CSS, PMS, FPSC, and PPSC. This section includes expertly designed multiple-choice questions that span major areas of biology, including cell biology, botany, zoology, genetics, microbiology, and human physiology. With each question crafted to improve conceptual clarity and analytical skills, this resource helps users achieve high scores in both academic and professional exams. Biology MCQs are also useful for students of FSc Pre-Medical, BSc, and other life science programs. Each question is aligned with the latest curriculum and designed according to the pattern of Pakistan’s competitive exams. Whether you are targeting entry tests, job assessments, or semester exams, our Biology MCQs offer reliable and result-oriented practice.
Q: What is the genetic material in most living organisms?
A) RNA
B) Protein
C) Lipid
D) DNA
✅ Correct Answer: D
Explanation: DNA stores genetic information in living cells.
Q: Which blood cells help in fighting infection?
A) Plasma
B) Red blood cells
C) White blood cells
D) Platelets
✅ Correct Answer: C
Explanation: White blood cells (leukocytes) defend the body against infection.
Q: Which vitamin is produced in the skin in sunlight?
A) Vitamin A
B) Vitamin B12
C) Vitamin D
D) Vitamin C
✅ Correct Answer: C
Explanation: Vitamin D is synthesized in the skin on exposure to UV rays.
Q: What pigment gives plants their green color?
A) Chlorophyll
B) Melanin
C) Carotene
D) Hemoglobin
✅ Correct Answer: A
Explanation: Chlorophyll absorbs light for photosynthesis and appears green.
Q: What type of blood is known as the universal donor?
A) A
B) AB
C) B
D) O
✅ Correct Answer: D
Explanation: Type O blood can be donated to all blood groups.
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.