100 original NEET Multiple Choice Questions (MCQs)

🎯 100 Original NEET MCQs | Practice Questions for NEET 2025 Preparation

Boost your NEET 2025 preparation with this exclusive set of 100 original NEET multiple choice questions (MCQs) covering all three subjects – Biology, Physics, and Chemistry. Designed as per the latest NEET exam pattern, these practice questions help you strengthen concepts, improve time management, and test your readiness for the big day.

🔍 What’s inside:
✔️ NEET Biology MCQs
✔️ NEET Physics MCQs
✔️ NEET Chemistry MCQs
✔️ Chapter-wise and mixed topic questions
✔️ Concept-based and application-level problems
✔️ Detailed and accurate answers (optional, if you're including them)

Perfect for self-study, mock tests, or as a quick revision tool before the exam!

📌 Keywords: NEET MCQs, NEET practice questions, NEET 2025 preparation, NEET mock test, NEET original questions, NEET Biology MCQs, NEET Physics MCQs, NEET Chemistry MCQs, NEET revision, NEET important questions

🧬 Biology (1–40)

1. Which of the following structures is not found in prokaryotic cells?
A. Plasma membrane
B. Ribosomes
C. Nucleus
D. Cytoplasm
Answer: C

2. Which phase of mitosis is characterized by alignment of chromosomes at the equator?
A. Prophase
B. Anaphase
C. Telophase
D. Metaphase
Answer: D

3. Which one of the following is a macronutrient for plants?
A. Zinc
B. Copper
C. Manganese
D. Magnesium
Answer: D

4. The term "double circulation" in humans refers to:
A. Flow of blood twice through lungs
B. Flow of blood through liver and kidneys
C. Separate circulation of oxygenated and deoxygenated blood
D. Blood circulation only in two chambers
Answer: C

5. Which hormone is responsible for seed dormancy?
A. Gibberellins
B. Cytokinins
C. Abscisic acid
D. Auxins
Answer: C

6. Which of the following is not a connective tissue?
A. Blood
B. Cartilage
C. Ligament
D. Epithelium
Answer: D

7. Which enzyme is secreted in the saliva?
A. Pepsin
B. Trypsin
C. Amylase
D. Lipase
Answer: C

8. DNA replication is:
A. Conservative
B. Semiconservative
C. Dispersive
D. None of the above
Answer: B

9. Which of the following diseases is caused by a protozoan?
A. Tuberculosis
B. Malaria
C. Typhoid
D. Cholera
Answer: B

10. Which organelle is responsible for producing ATP?
A. Ribosome
B. Nucleus
C. Mitochondrion
D. Lysosome
Answer: C

11. Which plant hormone promotes cell elongation?
A. Ethylene
B. Cytokinin
C. Auxin
D. Abscisic acid
Answer: C

12. Which blood group is known as universal donor?
A. AB+
B. AB−
C. O−
D. O+
Answer: C

13. Genetic drift is most likely to occur in:
A. Large populations
B. Asexual organisms
C. Small populations
D. All of the above
Answer: C

14. The structural and functional unit of a kidney is:
A. Glomerulus
B. Nephron
C. Bowman’s capsule
D. Loop of Henle
Answer: B

15. Which vitamin is synthesized by the skin?
A. Vitamin A
B. Vitamin B12
C. Vitamin D
D. Vitamin K
Answer: C

16. The Earthworm excretes nitrogenous waste in the form of:
A. Ammonia
B. Urea
C. Uric acid
D. None of these
Answer: A

17. The codon AUG codes for:
A. Methionine
B. Glycine
C. Stop codon
D. Valine
Answer: A

18. Which of the following is NOT a component of the female reproductive system?
A. Urethra
B. Oviduct
C. Ovary
D. Uterus
Answer: A

19. C4 plants differ from C3 plants by:
A. Number of chloroplasts
B. Pathway of carbon fixation
C. Type of cell division
D. Type of roots
Answer: B

20. Which of these is not an autoimmune disease?
A. Rheumatoid arthritis
B. Type 1 diabetes
C. AIDS
D. Multiple sclerosis
Answer: C

21. What type of immunity is acquired by vaccination?
A. Passive natural
B. Active artificial
C. Passive artificial
D. Active natural
Answer: B

22. Which pigment is responsible for absorption of light in photosynthesis?
A. Chlorophyll a
B. Xanthophyll
C. Carotene
D. Anthocyanin
Answer: A

23. Which cell is responsible for antibody production?
A. Helper T cell
B. Cytotoxic T cell
C. Plasma B cell
D. Memory T cell
Answer: C

24. A person with trisomy 21 suffers from:
A. Klinefelter’s syndrome
B. Down syndrome
C. Turner’s syndrome
D. Hemophilia
Answer: B

25. The energy currency of a cell is:
A. DNA
B. ATP
C. RNA
D. Glucose
Answer: B

26. Which of the following kingdoms includes unicellular prokaryotes?
A. Protista
B. Fungi
C. Monera
D. Plantae
Answer: C

27. Which of the following is an example of apomixis?
A. Fertilization without meiosis
B. Asexual seed formation
C. Pollination without fertilization
D. Vegetative propagation
Answer: B

28. What is the ploidy of endosperm in angiosperms?
A. Haploid
B. Diploid
C. Triploid
D. Tetraploid
Answer: C

29. In a food chain, the tertiary consumer is usually:
A. Herbivore
B. Primary producer
C. Top carnivore
D. Decomposer
Answer: C

30. Which structure prevents food from entering the windpipe?
A. Uvula
B. Glottis
C. Epiglottis
D. Pharynx
Answer: C

31. The function of lysosomes is:
A. Protein synthesis
B. Energy production
C. Intracellular digestion
D. Lipid synthesis
Answer: C

32. In human males, spermatogenesis occurs in:
A. Vas deferens
B. Seminal vesicle
C. Epididymis
D. Seminiferous tubules
Answer: D

33. Which of the following is an amphibian?
A. Turtle
B. Crocodile
C. Frog
D. Lizard
Answer: C

34. The first stable product of the Calvin cycle is:
A. Oxaloacetate
B. Pyruvate
C. 3-PGA
D. Glucose
Answer: C

35. In which part of the brain is the respiratory center located?
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus
Answer: C

36. Which blood component helps in clotting?
A. RBCs
B. WBCs
C. Platelets
D. Plasma
Answer: C

37. The main function of the large intestine is:
A. Digestion of food
B. Absorption of water
C. Production of bile
D. Nutrient absorption
Answer: B

38. Darwin proposed the theory of:
A. Inheritance of acquired traits
B. Mutation
C. Natural selection
D. Genetic drift
Answer: C

39. The human heart is:
A. Two-chambered
B. Three-chambered
C. Four-chambered
D. Single-chambered
Answer: C

40. The hormone responsible for milk ejection is:
A. Oxytocin
B. Prolactin
C. Estrogen
D. Progesterone
Answer: A

⚗️ Chemistry (41–70)

41. Which of the following is not a state function?
A. Internal energy
B. Enthalpy
C. Work
D. Pressure
Answer: C

42. The oxidation number of phosphorus in H₃PO₄ is:
A. +3
B. +5
C. +1
D. +4
Answer: B

43. Which gas is evolved when zinc reacts with dilute hydrochloric acid?
A. Oxygen
B. Hydrogen
C. Nitrogen
D. Carbon dioxide
Answer: B

44. What is the hybridization of carbon in ethyne (C₂H₂)?
A. sp
B. sp²
C. sp³
D. dsp²
Answer: A

45. Which of the following compounds has the highest boiling point?
A. Ethanol
B. Acetone
C. Diethyl ether
D. Methane
Answer: A

46. The shape of a molecule with sp³d² hybridization is:
A. Tetrahedral
B. Trigonal bipyramidal
C. Octahedral
D. Square planar
Answer: C

47. Which law states that equal volumes of gases at the same temperature and pressure contain equal number of molecules?
A. Boyle’s Law
B. Charles’s Law
C. Avogadro’s Law
D. Dalton’s Law
Answer: C

48. The molecular formula of benzene is:
A. C₆H₁₂
B. C₆H₆
C. C₅H₁₀
D. C₇H₈
Answer: B

49. Which of the following is an example of a Lewis acid?
A. NH₃
B. H₂O
C. AlCl₃
D. OH⁻
Answer: C

50. The pH of a neutral solution at 25°C is:
A. 5
B. 7
C. 9
D. 3
Answer: B

51. The unit of rate constant for a second-order reaction is:
A. mol⁻¹ L s⁻¹
B. mol L⁻¹ s⁻¹
C. s⁻¹
D. L mol⁻¹ s⁻¹
Answer: D

52. Which orbital has a spherical shape?
A. p
B. d
C. f
D. s
Answer: D

53. The number of valence electrons in sulfur (S) is:
A. 4
B. 5
C. 6
D. 7
Answer: C

54. Which of the following compounds is most acidic?
A. Ethanol
B. Acetic acid
C. Methane
D. Ethene
Answer: B

55. Which process is used to separate a mixture of liquids based on boiling points?
A. Filtration
B. Crystallization
C. Distillation
D. Sublimation
Answer: C

56. Which of the following is a noble gas?
A. Nitrogen
B. Neon
C. Fluorine
D. Oxygen
Answer: B

57. Which metal is extracted by electrolytic reduction?
A. Iron
B. Copper
C. Aluminium
D. Zinc
Answer: C

58. What is the IUPAC name of CH₃–CH₂–OH?
A. Methanol
B. Ethanol
C. Propanol
D. Butanol
Answer: B

59. Which of the following is not a colligative property?
A. Boiling point elevation
B. Freezing point depression
C. Osmotic pressure
D. Viscosity
Answer: D

60. Which of the following is an electrophile?
A. NH₃
B. OH⁻
C. NO₂⁺
D. Cl⁻
Answer: C

61. The color of Cu²⁺ ion in aqueous solution is:
A. Green
B. Blue
C. Yellow
D. Colorless
Answer: B

62. Which element has the highest electronegativity?
A. Oxygen
B. Fluorine
C. Nitrogen
D. Chlorine
Answer: B

63. The number of unpaired electrons in oxygen molecule (O₂) is:
A. 0
B. 1
C. 2
D. 4
Answer: C

64. Which of the following compounds does not exhibit hydrogen bonding?
A. Water
B. Ethanol
C. Dimethyl ether
D. HF
Answer: C

65. The SI unit of pressure is:
A. mmHg
B. atm
C. pascal
D. bar
Answer: C

66. Which process is responsible for rusting of iron?
A. Reduction
B. Combustion
C. Oxidation
D. Sublimation
Answer: C

67. In which type of reaction does an atom or ion gain electrons?
A. Oxidation
B. Neutralization
C. Reduction
D. Precipitation
Answer: C

68. Which of the following is an aromatic compound?
A. Cyclohexane
B. Benzene
C. Ethene
D. Propane
Answer: B

69. Which is the strongest acid among the following?
A. H₂SO₄
B. HCl
C. HNO₃
D. CH₃COOH
Answer: A

70. What is the maximum number of electrons that can be accommodated in a d-orbital?
A. 2
B. 4
C. 6
D. 10
Answer: D