All Free Everyday Science MCQs with Answers

931. Which part of the Camera is analogue to the retina in the human eye?

• A. Lens
• B. Film
• C. Aperture
• D. Shutter

Explanation: The retina receives the focused image and converts light into nerve signals, just as photographic film records the image in a camera. The camera lens corresponds more closely to the eye lens.

932. Dolly is the name of the ?

• A. First cloned sheep
• B. First cloned monkey
• C. First test-tube baby
• D. First human fossil

Explanation: Dolly was the first mammal cloned from an adult body cell, making her the first cloned sheep. She was produced in 1996 using somatic-cell nuclear transfer.

933. Dialysis is used for the treatment of__________?

• A. Kidney failure
• B. Heart weakness
• C. Brain diseases
• D. None of these

Explanation: Dialysis filters wastes and excess fluid from the blood when the kidneys can no longer perform this function adequately. It is therefore used in serious kidney failure.

934. ECG is used for the diagnosis of aliments of ?

• A. Brain
• B. Heart
• C. Kidneys
• D. Lungs

Explanation: An ECG records the heart’s electrical activity through electrodes placed on the skin. Abnormal rhythms and some evidence of heart damage can be detected from its tracing.

935. Short-sightedness can be corrected by using ___________?

• A. Convex lens
• B. Concave lens
• C. Convex-concave lens
• D. Concave-convex lens

Explanation: In myopia, distant images focus in front of the retina, often because the eyeball is too long or the lens is too strong. A concave lens spreads incoming rays so the image shifts back onto the retina.

936. Trachoma is a disease of the___________?

• A. Liver
• B. Eyes
• C. Lungs
• D. Kidneys

Explanation: Trachoma is a bacterial infection of the eye, especially the conjunctiva and cornea, and repeated infection can cause blindness. It is not a disease of the liver, lungs or kidneys.

937. Myopia is a disease connected with_________?

• A. Ears
• B. Eyes
• C. Lungs
• D. Brain

Explanation: Myopia, or short-sightedness, is a refractive error in which nearby objects are clear but distant objects appear blurred. It results from light focusing before the retina in the eye.

938. Leukemia is a disease of the___________?

• A. Lungs
• B. Blood
• C. Skin
• D. Nerves

Explanation: Leukemia is a cancer of blood-forming tissues, particularly the bone marrow, that produces abnormal white blood cells. It consequently disrupts normal blood-cell production.

939. Medulla oblongata is a part of human ___________?

• A. Heart
• B. Brain
• C. Liver
• D. Sex organ

Explanation: The medulla oblongata is the lower part of the brainstem. It controls vital involuntary functions such as breathing, heartbeat and blood pressure.

940. Which of the following diseases is caused by virus?

• A. Small pox
• B. Tuberculosis
• C. Malaria
• D. Cholera

Explanation: Smallpox is caused by the variola virus. Tuberculosis and cholera are bacterial diseases, while malaria is caused by a Plasmodium parasite transmitted by mosquitoes.