All Free Everyday Science MCQs with Answers

1301. Other name of platelets _______?

• A. Erythrocytes
• B. Leukocytes
• C. thrombocytes
• D. None of these

Explanation: Platelets are also called thrombocytes and help form blood clots. Leukocytes fight infection, whereas erythrocytes carry oxygen.

1302. Other name of red blood cells is ____________?

• A. Erythrocytes
• B. Leukocytes
• C. Thrombocytes
• D. None of these

Explanation: Red blood cells are erythrocytes, whose haemoglobin carries oxygen. Leukocytes are white blood cells and thrombocytes are platelets.

1303. Which of the following is a currency of Body cells?

• A. ADP
• B. DNA
• C. RNA
• D. ATP

Explanation: ATP is the cell’s immediate energy currency, because breaking its high-energy phosphate bonds supplies usable energy for cellular work. DNA stores genetic information, while ADP is the lower-energy molecule formed when ATP loses a phosphate.

1304. Wisdom teeth normally grow between the age of___________?

• A. 34-40
• B. 17-30
• C. 45-55
• D. 10-17

Explanation: Wisdom teeth, or third molars, usually erupt during late adolescence or early adulthood, commonly between about 17 and 25 years. The 17–30 range is the closest option; eruption can vary and some people never develop them.

1305. 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.

1306. 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.

1307. 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.

1308. 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.

1309. 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.

1310. 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.