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 process converts glucose into energy in cells?
A) Photosynthesis
B) Diffusion
C) Respiration
D) Transpiration
✅ Correct Answer: C
Explanation: Cellular respiration breaks down glucose to release energy.
Q: What is the basic unit of life?
A) Molecule
B) Cell
C) Organ
D) Tissue
✅ Correct Answer: B
Explanation: The cell is the fundamental structural and functional unit of living organisms.
Q: What is the process by which plants make their own food?
A) Photosynthesis
B) Digestion
C) Respiration
D) Fermentation
✅ Correct Answer: A
Explanation: Photosynthesis uses sunlight to produce glucose in plants.
Q: Which blood group is known as the universal donor?
A) AB
B) O
C) B
D) A
✅ Correct Answer: B
Explanation: Blood group O can donate to any group due to lack of A and B antigens.
Q: What carries oxygen in the blood?
A) Hemoglobin
B) White cells
C) Plasma
D) Platelets
✅ Correct Answer: A
Explanation: Hemoglobin in red blood cells binds and carries oxygen.
Q: Which vitamin is essential for blood clotting?
A) Vitamin D
B) Vitamin A
C) Vitamin K
D) Vitamin C
✅ Correct Answer: C
Explanation: Vitamin K is needed for the synthesis of clotting proteins.
Q: Which gland regulates metabolism?
A) Pituitary
B) Pancreas
C) Adrenal
D) Thyroid
✅ Correct Answer: D
Explanation: The thyroid gland controls metabolism via hormone release.
Q: What is the function of ribosomes?
A) Store DNA
B) Digest food
C) Produce ATP
D) Synthesize proteins
✅ Correct Answer: D
Explanation: Ribosomes are responsible for protein synthesis.
Q: Which structure controls the movement of substances in and out of a cell?
A) Cell wall
B) Nucleus
C) Cell membrane
D) Cytoplasm
✅ Correct Answer: C
Explanation: The cell membrane regulates material movement.
Q: Where does photosynthesis take place?
A) Chloroplast
B) Mitochondria
C) Vacuole
D) Ribosome
✅ Correct Answer: A
Explanation: Chloroplasts contain chlorophyll needed for photosynthesis.