Free Human Body and Health MCQs with Answers

411. Edward Genner discovered 'vaccine' in___________?

• A. 1796
• B. 1978
• C. 1686
• D. 1933

Explanation: Edward Jenner introduced the first successful vaccination against smallpox in 1796. His work used cowpox exposure to produce protection against smallpox.

412. Nervous system includes which of these major components?

• A. Brain
• B. Brain & Back Bone
• C. brain, spinal cord and neurons
• D. None

Explanation: The nervous system includes the brain and spinal cord, while neurons are the specialised cells that transmit its signals. Option c is the closest complete description among the choices, whereas the backbone is a bone, not the spinal cord.

413. The lenses are used for the correction of:____________?

• A. Long-sightedness
• B. short sightedness
• C. Both A & B
• D. None of those

Explanation: Corrective lenses treat both long-sightedness and short-sightedness: convex lenses help long-sighted eyes, while concave lenses help short-sighted eyes. The lens type differs, but both are refractive errors corrected with lenses.

414. Guava has the maximum amount of which Vitamin?

• A. vitamin K
• B. vitamin B
• C. vitamin C
• D. vitamin D

Explanation: Guava is especially rich in vitamin C, often providing more vitamin C per unit weight than many citrus fruits. Vitamins K, B and D are not its defining nutritional strength.

415. Biopsy is done on tissues taken from__________?

• A. Human body
• B. Animal body
• C. Living body
• D. Dead body

Explanation: A biopsy examines a sample of tissue removed from a living body to detect disease, especially cancer. Tissue from a dead body is examined by autopsy or post-mortem analysis.

416. Liver uses which vitamin for creating new Red Blood cells?

• A. B12
• B. B6
• C. A
• D. K

Explanation: Vitamin B12 is essential for normal red blood-cell formation, and the liver stores much of the body's B12. Vitamin K mainly supports blood clotting rather than red-cell production.

417. The only living cells in the body without blood supply is___________?

• A. Pupil
• B. Nail
• C. Cornea
• D. Hair

Explanation: The cornea is living tissue but has no blood vessels, so it receives oxygen mainly from tears and the surrounding air. Hair and nails are largely dead keratin structures rather than living cells.

418. A common skin condition that causes skin redness and irritation is known as_________?

• A. Psoriasis
• B. Hypermetropia
• C. Leukoderma
• D. Diphtheria

Explanation: Psoriasis commonly produces red, inflamed and irritated patches of skin, often covered with silvery scales. Hypermetropia is a vision defect, while leukoderma involves loss of skin pigment.

419. A clouding that develops in the lens of the eye or in its envelope obstructing the passage of light is known as________?

• A. Glaucoma
• B. Hemophilia
• C. Cataract
• D. Diphtheria

Explanation: A cataract is clouding of the eye's lens, preventing light from passing clearly to the retina. Glaucoma is mainly associated with optic-nerve damage, often linked to raised eye pressure.

420. The blind spot is located at the ___________ of the eye ?

• A. pupil
• B. vitreous humor
• C. aqueous humor
• D. optic disc

Explanation: The blind spot is at the optic disc, where the optic nerve leaves the eye and no light-sensitive photoreceptors are present. The pupil and eye fluids do not form the blind spot.