All Free Everyday Science MCQs with Answers

1371. Which of the following animals does not have nervous system?

• A. Bat
• B. Squirrel
• C. Sponges
• D. Lizard

Explanation: Sponges have no nervous system or true nerve cells and respond through simple cellular mechanisms. Bats, squirrels and lizards are vertebrates with nervous systems.

1372. Through which organ does a fish respire?

• A. Nose
• B. Lungs
• C. Gills
• D. Fins

Explanation: Fish respire through gills, whose thin surfaces extract dissolved oxygen from water and release carbon dioxide. Fins provide movement and balance rather than respiration.

1373. Who first discovered how blood circulates in the human body?

• A. Edward Jenner
• B. Joseph Lister
• C. William Harvey
• D. Gregor Mendel

Explanation: William Harvey described the circulation of blood through the heart and blood vessels in the seventeenth century. Jenner is associated with vaccination, Lister with antiseptic surgery, and Mendel with genetics.

1374. Inside which organ is the gallbladder located?

• A. Pancreas
• B. Liver
• C. Kidney
• D. Small intestine

Explanation: The gallbladder is a small sac attached to the underside of the liver, where it stores and concentrates bile made by the liver. It is not part of the kidney, pancreas or small intestine.

1375. Name the drugs which block the sensory nerves and prevent the patient from feeling pain?

• A. Analgesics
• B. Antibiotics
• C. Antihistamines
• D. Anaesthetics

Explanation: Anaesthetics block or reduce sensation, allowing procedures to be performed without pain or awareness in appropriate cases. Analgesics relieve pain but do not necessarily block all sensory nerve activity.

1376. The study of rearing fine and intelligent human beings through genetics is called__________?

• A. Eugenics
• B. Biotechnology
• C. Cloning
• D. Geneology

Explanation: Eugenics is the discredited historical movement that sought to improve human hereditary traits through selective breeding and reproductive control. Biotechnology is a broader use of organisms or biological processes in technology.

1377. Study of energy production in living bodies is called_________?

• A. Biology
• B. Biomechanics
• C. Bioenergetics
• D. Aerodynamics

Explanation: Bioenergetics studies how living organisms obtain, transform and use energy, including energy production in cells. Biomechanics instead examines forces and movement in living systems.

1378. Which of the following in the human body is affected by leukemia?

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

Explanation: Leukaemia is a cancer of blood-forming tissues, especially the bone marrow, which produces abnormal white blood cells. It consequently disrupts the normal blood-cell population rather than primarily affecting the lungs, eyes or nerves.

1379. The 2018 Nobel Prize in Physiology or Medicine has been awarded jointly to James P Allison and Tasuku Honjo for their discovery of which cancer?

• A. Chemotherapy
• B. Radiation
• C. Surgery
• D. Immunotherapy

Explanation: Allison and Honjo were awarded the 2018 Nobel Prize for discovering cancer therapy based on immune-checkpoint inhibition, a form of immunotherapy. The prize was not for chemotherapy, radiation, or surgery.

1380. Which blood group is universal receiver?

• A. Group A
• B. Group B
• C. Group AB
• D. GROUP O

Explanation: In the ABO system, AB blood has both A and B antigens but no anti-A or anti-B antibodies, allowing an AB person to receive A, B, AB or O blood. This standard answer assumes compatible Rh factor and properly cross-matched transfusion.