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: Which organ is responsible for detoxifying chemicals?
A) Liver
B) Heart
C) Brain
D) Lung
✅ Correct Answer: A
Explanation: The liver detoxifies harmful substances.
Q: What is the function of hemoglobin?
A) Carry oxygen
B) Fight infection
C) Digest food
D) Clot blood
✅ Correct Answer: A
Explanation: Hemoglobin in RBCs binds and transports oxygen.
Q: Which plant tissue transports food?
A) Xylem
B) Phloem
C) Epidermis
D) Cambium
✅ Correct Answer: B
Explanation: Phloem carries sugars and nutrients.
Q: Which process removes waste from the body?
A) Digestion
B) Excretion
C) Absorption
D) Respiration
✅ Correct Answer: B
Explanation: Excretion eliminates metabolic waste.
Q: What do we call the fusion of male and female gametes?
A) Pollination
B) Germination
C) Fertilization
D) Fragmentation
✅ Correct Answer: C
Explanation: Fertilization is the union of gametes to form a zygote.
Q: Which animal is a cold-blooded vertebrate?
A) Whale
B) Pigeon
C) Dog
D) Frog
✅ Correct Answer: D
Explanation: Frogs are ectothermic, adjusting to environmental temperatures.
Q: Which part of the cell contains genetic material?
A) Ribosome
B) Nucleus
C) Mitochondria
D) Cytoplasm
✅ Correct Answer: B
Explanation: The nucleus stores DNA, the genetic blueprint of the cell.
Q: Which organelle is known as the powerhouse of the cell?
A) Nucleus
B) Mitochondria
C) Ribosome
D) Golgi apparatus
✅ Correct Answer: B
Explanation: Mitochondria produce ATP through cellular respiration.
Q: What type of blood cells fight infections?
A) Platelets
B) Plasma
C) White blood cells
D) Red blood cells
✅ Correct Answer: C
Explanation: White blood cells defend the body against pathogens.
Q: Which macromolecule is the main source of energy for the body?
A) Carbohydrates
B) Fats
C) Nucleic acids
D) Proteins
✅ Correct Answer: A
Explanation: Carbohydrates are broken down into glucose for energy.