Free Human Body and Health MCQs with Answers

481. 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.

482. 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.

483. 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.

484. 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.

485. 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.

486. 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.

487. Which of the following regulates the Metabolism Of Sugar?

• A. Thyroid
• B. Insulin
• C. Glucose
• D. None of These

Explanation: Insulin lowers blood glucose by helping body cells take up glucose and by promoting its storage as glycogen. The thyroid affects metabolism generally, but it does not directly regulate blood sugar in this way.

488. Saliva contains__________?

• A. Amylases
• B. Bite
• C. Trypsin
• D. None of these

Explanation: Saliva contains salivary amylase, an enzyme that begins the digestion of starch into smaller sugars in the mouth. Trypsin acts later in the small intestine, while “bite” is not a digestive enzyme.

489. What amount of fats give energy of 9.3 K Calories?

• A. 0.5 gram
• B. 1.0 gram
• C. 2.0 gram
• D. 4.1 gram

Explanation: Fat provides about 9.3 kilocalories per gram, more than double the energy supplied by one gram of carbohydrate or protein. Therefore 1.0 gram of fat gives the stated energy.

490. One gram of carbohydrates give energy of the amount?

• A. 2 K Calories
• B. 4.1 K Calories
• C. 6.3 K Calories
• D. 8.0 K Calories

Explanation: Carbohydrates supply approximately 4.1 kilocalories per gram when metabolised. Fats supply about 9.3 kilocalories per gram, so the higher values are not appropriate here.