All Free Everyday Science MCQs with Answers

1171. The Structure in a cell which contains the genes is called:

• A. Genetics
• B. Saliva
• C. Marrow
• D. Chromosome

Explanation: Genes are arranged on chromosomes, which are DNA-containing structures inside cells. Genetics is the study of heredity, not a structure, while saliva and marrow are body substances or tissues.

1172. Exposure to sunlight helps a person improve his health because ________?

• A. Resistance power increases
• B. The infrared light kills bacteria in the body
• C. The ultraviolet rays convert skin oil into Vitamin D
• D. The pigment cells in the skin get stimulated and produce a healthy tan

Explanation: UVB radiation starts the production of vitamin D in the skin from a cholesterol-derived precursor, which supports bone health and calcium absorption. The option's reference to skin oil is an oversimplification, but it identifies the correct sunlight mechanism among the choices.

1173. Which of the following in human body is involved in controlling blood sugar level?

• A. Pitutary glands
• B. Islets of Langerhans
• C. Hypothalamus
• D. Spleen

Explanation: The Islets of Langerhans in the pancreas contain beta cells that release insulin and alpha cells that release glucagon, together regulating blood glucose. The pituitary and hypothalamus control other endocrine functions, while the spleen does not regulate blood sugar directly.

1174. The most important function of perspiration is?

• A. Get rid of body waste
• B. Regulate body temperature
• C. Regulate body waste
• D. Lubricate the skin

Explanation: Perspiration cools the body when sweat evaporates from the skin, carrying away heat. Waste removal is a minor function of sweat, not its main purpose.

1175. Seed Coat is also called _________?

• A. Radical
• B. Testa
• C. Tegmen
• D. None of these

Explanation: The testa is the outer protective seed coat. Tegmen is the inner layer of the seed coat, while the radicle develops into the embryonic root.

1176. In your body where is the Macula located?

• A. Knee center of leg
• B. Eye center of Retina
• C. Brain center of Cerebrum
• D. None of these

Explanation: The macula is a specialised region near the centre of the retina responsible for sharp central vision, especially reading and seeing fine detail. It is not located in the brain or knee.

1177. Which vegetable is also a flower __________?

• A. Lady Finger
• B. Broccoli
• C. Tomato
• D. None of these

Explanation: Broccoli is the immature flower head of the broccoli plant, made up of tightly packed flower buds. Lady finger is a fruit and tomato is botanically a fruit, not a flower.

1178. Cotyledons are very Important because they ________?

• A. Store Food
• B. Store Water
• C. Store Air
• D. None of these

Explanation: Cotyledons commonly nourish the developing embryo by storing or absorbing food reserves in the seed. In some plants they later become photosynthetic leaves, but storing food is the standard function tested here.

1179. Hepatitis and Polio is caused by________?

• A. Virus
• B. Fungus
• C. Moss
• D. None of these

Explanation: Both hepatitis and polio can be caused by viruses: viral hepatitis affects the liver, while poliovirus can damage the nervous system. Fungi and moss are not the causes of these diseases.

1180. First antibiotic was extracted from a _________?

• A. Bacteria
• B. virus
• C. Fungus
• D. None of these

Explanation: Penicillin, commonly regarded as the first widely used antibiotic, was obtained from the fungus Penicillium. This is why the fungal option is correct rather than bacteria or viruses.