Practice 50 important Biology MCQs for NEET exam preparation with correct answers. NCERT-based questions covering cell biology, genetics, human physiology, ecology, and biotechnology.
Biology Practice Questions for NEET Aspirants | NCERT-Based Questions
1. The basic unit of life is:
A) Tissue
B) Organ
C) Cell
D) Organ system
✅ Correct Answer: C) Cell
2. The powerhouse of the cell is:
A) Nucleus
B) Mitochondria
C) Ribosome
D) Golgi apparatus
✅ Correct Answer: B) Mitochondria
3. DNA is mainly located in:
A) Ribosome
B) Cytoplasm
C) Nucleus
D) Vacuole
✅ Correct Answer: C) Nucleus
4. The process of formation of RNA from DNA is called:
A) Translation
B) Transcription
C) Replication
D) Mutation
✅ Correct Answer: B) Transcription
5. Ribosomes are responsible for:
A) Photosynthesis
B) Protein synthesis
C) Respiration
D) Cell division
✅ Correct Answer: B) Protein synthesis
6. Which organelle contains chlorophyll?
A) Mitochondria
B) Chloroplast
C) Nucleus
D) Lysosome
✅ Correct Answer: B) Chloroplast
7. The fluid mosaic model of cell membrane was proposed by:
A) Watson and Crick
B) Singer and Nicolson
C) Darwin and Wallace
D) Mendel
✅ Correct Answer: B) Singer and Nicolson
8. The study of heredity is called:
A) Ecology
B) Genetics
C) Anatomy
D) Physiology
✅ Correct Answer: B) Genetics
9. Mendel performed his experiments on:
A) Pea plant
B) Wheat
C) Maize
D) Rose
✅ Correct Answer: A) Pea plant
10. The genetic material in most organisms is:
A) Protein
B) RNA
C) DNA
D) Lipid
✅ Correct Answer: C) DNA
Human Physiology MCQs
11. The normal human heartbeat rate is approximately:
A) 20/min
B) 72/min
C) 120/min
D) 200/min
✅ Correct Answer: B) 72/min
12. The red colour of blood is due to:
A) Plasma
B) Haemoglobin
C) Platelets
D) WBC
✅ Correct Answer: B) Haemoglobin
13. Insulin hormone is secreted by:
A) Thyroid gland
B) Pancreas
C) Pituitary gland
D) Adrenal gland
✅ Correct Answer: B) Pancreas
14. Functional unit of kidney is:
A) Neuron
B) Nephron
C) Alveoli
D) Villus
✅ Correct Answer: B) Nephron
15. Oxygen is transported in blood by:
A) RBC
B) WBC
C) Platelets
D) Plasma proteins
✅ Correct Answer: A) RBC
16. The largest gland in the human body is:
A) Pancreas
B) Liver
C) Thyroid
D) Salivary gland
✅ Correct Answer: B) Liver
17. Gas exchange in lungs occurs in:
A) Bronchi
B) Trachea
C) Alveoli
D) Larynx
✅ Correct Answer: C) Alveoli
18. The hormone responsible for growth is:
A) Insulin
B) Growth hormone
C) Thyroxine
D) Adrenaline
✅ Correct Answer: B) Growth hormone
19. The largest part of the human brain is:
A) Cerebellum
B) Cerebrum
C) Medulla
D) Pons
✅ Correct Answer: B) Cerebrum
20. Vitamin required for blood clotting is:
A) Vitamin A
B) Vitamin B
C) Vitamin C
D) Vitamin K
✅ Correct Answer: D) Vitamin K
Plant Biology MCQs
21. Photosynthesis occurs in:
A) Mitochondria
B) Chloroplast
C) Nucleus
D) Ribosome
✅ Correct Answer: B) Chloroplast
22. Water is transported in plants by:
A) Phloem
B) Xylem
C) Stomata
D) Cortex
✅ Correct Answer: B) Xylem
23. Food is transported in plants by:
A) Xylem
B) Phloem
C) Root hair
D) Epidermis
✅ Correct Answer: B) Phloem
24. The opening and closing of stomata is controlled by:
A) Guard cells
B) Root cells
C) Xylem cells
D) Epidermal cells
✅ Correct Answer: A) Guard cells
25. Auxin hormone helps in:
A) Cell division and growth
B) Protein digestion
C) Blood formation
D) Respiration
✅ Correct Answer: A) Cell division and growth
Ecology & Environment MCQs
26. The first trophic level consists of:
A) Consumers
B) Decomposers
C) Producers
D) Carnivores
✅ Correct Answer: C) Producers
27. Green plants are called:
A) Consumers
B) Producers
C) Parasites
D) Decomposers
✅ Correct Answer: B) Producers
28. The ozone layer protects Earth from:
A) Infrared rays
B) UV rays
C) Radio waves
D) Sound waves
✅ Correct Answer: B) UV rays
29. Biodiversity means:
A) Variety of living organisms
B) Climate change
C) Pollution
D) Soil formation
✅ Correct Answer: A) Variety of living organisms
30. The study of interaction between organisms and environment is:
A) Genetics
B) Ecology
C) Taxonomy
D) Evolution
✅ Correct Answer: B) Ecology
Biotechnology & Genetics MCQs
31. PCR technique is used for:
A) DNA amplification
B) Protein digestion
C) Cell division
D) Photosynthesis
✅ Correct Answer: A) DNA amplification
32. The father of genetics is:
A) Darwin
B) Mendel
C) Watson
D) Lamarck
✅ Correct Answer: B) Mendel
33. Human chromosome number is:
A) 23
B) 46
C) 48
D) 44
✅ Correct Answer: B) 46
34. Female sex chromosomes are:
A) XY
B) XX
C) YY
D) XO
✅ Correct Answer: B) XX
35. DNA double helix model was given by:
A) Darwin and Mendel
B) Watson and Crick
C) Hooke and Leeuwenhoek
D) Miller and Urey
✅ Correct Answer: B) Watson and Crick
NEET Advanced Biology MCQs
36. Enzymes are mostly:
A) Carbohydrates
B) Proteins
C) Lipids
D) Vitamins
✅ Correct Answer: B) Proteins
37. ATP is known as:
A) Genetic material
B) Energy currency of cell
C) Digestive enzyme
D) Hormone
✅ Correct Answer: B) Energy currency of cell
38. Meiosis produces:
A) Diploid cells
B) Haploid cells
C) Bacteria
D) Tissues
✅ Correct Answer: B) Haploid cells
39. The immune system's main cells are:
A) RBC
B) WBC
C) Platelets
D) Neurons
✅ Correct Answer: B) WBC
40. Antibodies are produced by:
A) B-lymphocytes
B) RBC
C) Platelets
D) Neurons
✅ Correct Answer: A) B-lymphocytes
41. The smallest bone in the human body is:
A) Femur
B) Stapes
C) Tibia
D) Radius
✅ Correct Answer: B) Stapes
42. The longest bone in humans is:
A) Femur
B) Humerus
C) Tibia
D) Fibula
✅ Correct Answer: A) Femur
43. The universal donor blood group is:
A) AB+
B) O−
C) A+
D) B+
✅ Correct Answer: B) O−
44. The universal recipient blood group is:
A) O−
B) AB+
C) A−
D) B−
✅ Correct Answer: B) AB+
45. The powerhouse of photosynthesis is:
A) Chloroplast
B) Ribosome
C) Nucleus
D) Vacuole
✅ Correct Answer: A) Chloroplast
46. The process of cell division producing two identical cells is:
A) Meiosis
B) Mitosis
C) Fertilization
D) Mutation
✅ Correct Answer: B) Mitosis
47. Human blood pH is approximately:
A) 5.5
B) 7.4
C) 9.5
D) 2.0
✅ Correct Answer: B) 7.4
48. The study of tissues is called:
A) Histology
B) Cytology
C) Ecology
D) Embryology
✅ Correct Answer: A) Histology
49. The basic unit of nervous system is:
A) Nephron
B) Neuron
C) Axon
D) Synapse
✅ Correct Answer: B) Neuron
50. The process by which plants prepare food is:
A) Respiration
B) Photosynthesis
C) Transpiration
D) Fermentation
✅ Correct Answer: B) Photosynthesis
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