Biology MCQ for Based on The NEET

 

Part 1 – Biology (Human Physiology & Genetics) – 50 MCQs

1. Which organ produces insulin?
   A) Liver
   B) Pancreas 
   C) Kidney
   D) Spleen                                                                                                                                              Ans=(B)

2. The functional unit of the kidney :

3. A) Neuron
   B) Nephron 
   C) Alveoli
   D) Hepatocyte                                                                                                                                       Ans=(B)

4. Hemoglobin is present are:
   A) Plasma
   B) Red blood cells 
   C) White blood cells
   D) Platelets                                                                                                                                            Ans=(B)

5. The site of fertilization in human female is:
   A) Ovary
   B) Uterus
   C) Fallopian tube ✅
   D) Vagina

6. The type of blood that contains carbon dioxide mainly are:
   A) Arterial blood
   B) Venous blood ✅
   C) Capillary blood
   D) Lymph

7. Which hormone regulates calcium level in blood?
   A) Thyroxine
   B) Calcitonin ✅
   C) Insulin
   D) Adrenaline

8. Which of the following is not a part of the CNS?
   A) Brain
   B) Spinal cord
   C) Sciatic nerve ✅
   D) Cerebellum

9. Oxygen exchange occurs in:
   A) Bronchi
   B) Alveoli ✅
   C) Trachea
   D) Pharynx

10. ABO blood group is controlled by the:
    A) Single gene
    B) Multiple alleles ✅
    C) Codominance
    D) Sex-linked gene

11. DNA replication is:
    A) Conservative
    B) Semi-conservative ✅
    C) Dispersive
    D) Random

12. Male gamete is called:
    A) Ovum
    B) Sperm ✅
    C) Zygote
    D) Spore

13. Fertilization leads to formation of:
    A) Zygote ✅
    B) Embryo
    C) Gamete
    D) Ovum

14. Which blood cells fight infections?
    A) RBC
    B) WBC ✅
    C) Platelets
    D) Plasma

15. Which vitamin is essential for clotting?
    A) Vitamin A
    B) Vitamin C
    C) Vitamin K ✅
    D) Vitamin D

16. The structural and functional unit of life is:
    A) Atom
    B) Molecule
    C) Cell ✅
    D) Tissue

17. Which part of the brain controls balance and coordination?
    A) Cerebrum
    B) Cerebellum ✅
    C) Medulla
    D) Hypothalamus

18. The normal human heart rate is:
    A) 40–60 bpm
    B) 60–100 bpm ✅
    C) 100–120 bpm
    D) 120–140 bpm

19. Hemophilia is:
    A) Vitamin deficiency
    B) Sex-linked disease ✅
    C) Infectious disease
    D) Autoimmune disease

20. The hormone secreted by adrenal medulla is:
    A) Cortisol
    B) Adrenaline ✅
    C) Thyroxine
    D) Insulin

21. The functional unit of nervous system is:
    A) Nephron
    B) Neuron ✅
    C) Axon
    D) Dendrite

22. Gene controlling the trait is called:
    A) Allele
    B) Locus
    C) Genotype ✅
    D) Phenotype

23. Which blood group is universal donor?
    A) A
    B) B
    C) AB
    D) O ✅

24. The exchange of gases in human lungs occurs by:
    A) Active transport
    B) Diffusion ✅
    C) Osmosis
    D) Filtration

25. The layer of skin which contains blood vessels is:
    A) Epidermis
    B) Dermis ✅
    C) Hypodermis
    D) Keratin

26. The genetic material in humans is:
    A) RNA
    B) DNA ✅
    C) Protein
    D) Lipid

27. Antibodies are produced by:
    A) RBC
    B) WBC ✅
    C) Platelets
    D) Plasma

28. Insulin deficiency leads to the:
    A) Hypoglycemia
    B) Hyperglycemia ✅
    C) Hypertension
    D) Anemia

29. The largest gland in human body is:
    A) Pancreas
    B) Liver ✅
    C) Kidney
    D) Thyroid

30. The cell organelle responsible for energy production is:
    A) Ribosome
    B) Mitochondria ✅
    C) Nucleus
    D) Golgi body

31. Which hormone regulates metabolism?
    A) Insulin
    B) Thyroxine ✅
    C) Cortisol
    D) Estrogen

32. DNA is located in:
    A) Cytoplasm
    B) Nucleus ✅
    C) Ribosome
    D) Mitochondria

33. Sickle cell anemia is caused due to:
    A) Vitamin deficiency
    B) Mutation in gene ✅
    C) Bacterial infection
    D) Viral infection

34. Which vitamin deficiency causes rickets?
    A) Vitamin A
    B) Vitamin D ✅
    C) Vitamin C
    D) Vitamin K

35. Which part of brain regulates involuntary actions?
    A) Cerebellum
    B) Medulla oblongata ✅
    C) Cerebrum
    D) Hypothalamus

36. The liquid part of blood is:
    A) Plasma ✅
    B) Serum
    C) Lymph
    D) Platelets

37. Female gamete is called:
    A) Sperm
    B) Ovum ✅
    C) Zygote
    D) Embryo

38. HIV attacks which cells in human body?
    A) RBC
    B) WBC (T-helper cells) ✅
    C) Platelets
    D) Plasma

39. Which hormone is secreted by thyroid?
    A) Insulin
    B) Thyroxine ✅
    C) Adrenaline
    D) Cortisol

40. The number of chromosomes in human somatic cells is:
    A) 23
    B) 46 ✅
    C) 22
    D) 44

41. Mendel’s first law is:
    A) Law of independent assortment
    B) Law of segregation ✅
    C) Law of dominance
    D) Law of mutation

42. Blood pressure is measured by:
    A) Thermometer
    B) Sphygmomanometer ✅
    C) Barometer
    D) Stethoscope

43. Synapse is:
    A) Gap between muscles
    B) Gap between neurons ✅
    C) Gap in blood vessels
    D) Gap in bones

44. The main site of digestion of proteins is:
    A) Mouth
    B) Stomach ✅
    C) Small intestine
    D) Large intestine

45. Vitamin B12 is mainly obtained from:
    A) Green leafy vegetables
    B) Meat and eggs ✅
    C) Citrus fruits
    D) Milk

46. The nitrogenous base present in RNA but not in DNA is:
    A) Adenine
    B) Cytosine
    C) Uracil ✅
    D) Thymine

47. Which organ is excretes urea?
    A) Liver
    B) Kidney ✅
    C) Lungs
    D) Skin

48. Red blood cells is produced in:
    A) Liver
    B) Bone marrow ✅
    C) Spleen
    D) Kidney

49. The main pigment responsible for photosynthesis is plants:
    A) Chlorophyll ✅
    B) Carotene
    C) Xanthophyll
    D) Anthocyanin

50. Diabetic patients have problem with are:
    A) Insulin ✅
    B) Thyroxine
    C) Adrenaline
    D) Cortisol

51. The hormone responsible for fight or flight response is:
    A) Insulin
    B) Adrenaline ✅
    C) Thyroxine
    D) Cortisol

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