Biology MCQs (1–30) with Answers and Explanations are designed to strengthen core concepts of Cell Biology, Human Physiology, Genetics, and Plant Science.
These objective questions are highly useful for NEET Biology preparation and also help students in school exams and other competitive tests where MCQ-based practice improves accuracy.
Practicing Biology MCQs builds conceptual clarity, improves revision speed, and strengthens memory-based topics commonly asked in entrance examinations.
Practicing Biology MCQs builds conceptual clarity, improves revision speed, and strengthens memory-based topics commonly asked in entrance examinations.
1. The basic unit of life is:
Correct Answer: B
Reason: Cell is the structural and functional unit of all living organisms.
2. The cell organelle known as the “powerhouse of the cell” is:
Correct Answer: C
Reason: Mitochondria produce ATP energy through cellular respiration.
3. Photosynthesis mainly occurs in:
Correct Answer: A
Reason: Chloroplast contains chlorophyll and is the site of photosynthesis.
4. The genetic material in most organisms is:
Correct Answer: B
Reason: DNA stores and transmits hereditary information.
5. The process of cell division in somatic cells is:
Correct Answer: A
Reason: Mitosis produces two identical daughter cells in body tissues.
6. The fluid part of blood is called:
Correct Answer: D
Reason: Plasma is the liquid component that carries cells and nutrients.
7. The oxygen-carrying pigment in human blood is:
Correct Answer: B
Reason: Hemoglobin binds oxygen and transports it in RBCs.
8. The organ that pumps blood in the human body is:
Correct Answer: C
Reason: Heart pumps blood to all parts of the body through vessels.
9. The functional unit of kidney is:
Correct Answer: A
Reason: Nephron filters blood and forms urine in kidneys.
10. The site of protein synthesis in cells is:
Correct Answer: D
Reason: Ribosomes are responsible for protein synthesis.
11. The largest part of the human brain is:
Correct Answer: A
Reason: Cerebrum controls thinking, memory, and voluntary actions.
12. The organelle responsible for packaging and secretion is:
Correct Answer: C
Reason: Golgi apparatus modifies, packages and secretes materials.
13. Which vitamin is produced in the skin in presence of sunlight?
Correct Answer: D
Reason: Vitamin D is synthesized in skin under UV sunlight.
14. The blood group system discovered by Karl Landsteiner is:
Correct Answer: A
Reason: Landsteiner discovered the ABO blood group system.
15. The process by which green plants lose water vapour is called:
Correct Answer: B
Reason: Transpiration is the loss of water vapour mainly through stomata.
16. The pigment responsible for green color in plants is:
Correct Answer: D
Reason: Chlorophyll absorbs sunlight for photosynthesis.
17. The structural and functional unit of nervous system is:
Correct Answer: A
Reason: Neuron is the basic unit that transmits nerve impulses.
18. Which part of the plant absorbs water from soil?
Correct Answer: C
Reason: Root hairs increase surface area for absorption of water and minerals.
19. The liquid connective tissue in humans is:
Correct Answer: B
Reason: Blood is a fluid connective tissue that transports substances.
20. Which of the following is not a part of the digestive system?
Correct Answer: D
Reason: Trachea is part of the respiratory system, not digestive system.
21. The basic unit of heredity is:
Correct Answer: B
Reason: Genes are units of heredity located on chromosomes.
22. The number of chromosomes in humans is:
Correct Answer: C
Reason: Humans have 46 chromosomes (23 pairs).
23. The process of conversion of glucose into energy is:
Correct Answer: A
Reason: Cellular respiration breaks down glucose to release ATP energy.
24. The gas released during photosynthesis is:
Correct Answer: D
Reason: Oxygen is released as a by-product of photosynthesis.
25. Which tissue transports water in plants?
Correct Answer: A
Reason: Xylem conducts water and minerals from roots to leaves.
26. Which tissue transports food in plants?
Correct Answer: B
Reason: Phloem transports prepared food from leaves to other parts.
27. The organ responsible for filtering blood in humans is:
Correct Answer: D
Reason: Kidneys filter blood and remove nitrogenous wastes.
28. The smallest blood vessels are called:
Correct Answer: C
Reason: Capillaries allow exchange of gases and nutrients with tissues.
29. The universal donor blood group is:
Correct Answer: D
Reason: Blood group O is commonly considered the universal donor (especially O negative).
30. The universal recipient blood group is:
Correct Answer: C
Reason: AB blood group can receive blood from all ABO groups (with Rh factor compatibility).
Biology MCQs (1–30) FAQs
1. Which topics are covered in Biology MCQs (1–30)?
This set covers basic cell biology, human physiology fundamentals, plant tissues, and genetics basics useful for revision.
2. Are these Biology MCQs useful for NEET preparation?
Yes, these questions strengthen conceptual clarity and improve objective practice for NEET Biology chapters.
3. Can school students also use these Biology MCQs?
Yes, these MCQs are helpful for school exams, quick revision, and practice in science objective tests.
4. Do these MCQs include answers with explanations?
Yes, every question includes the correct answer along with a short reason for better understanding.
5. How should students revise Biology using MCQs?
Solve MCQs daily, review reasons, and revise weak topics repeatedly to improve accuracy and speed.
This set covers basic cell biology, human physiology fundamentals, plant tissues, and genetics basics useful for revision.
2. Are these Biology MCQs useful for NEET preparation?
Yes, these questions strengthen conceptual clarity and improve objective practice for NEET Biology chapters.
3. Can school students also use these Biology MCQs?
Yes, these MCQs are helpful for school exams, quick revision, and practice in science objective tests.
4. Do these MCQs include answers with explanations?
Yes, every question includes the correct answer along with a short reason for better understanding.
5. How should students revise Biology using MCQs?
Solve MCQs daily, review reasons, and revise weak topics repeatedly to improve accuracy and speed.
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