Free Human Body and Health MCQs with Answers

1. Deficiency of Vitamin C causes which disease?

• A. Rickets
• B. Scurvy
• C. Beriberi
• D. Night blindness

Explanation: Vitamin C (ascorbic acid) is required for collagen synthesis; its deficiency causes scurvy, marked by bleeding gums and poor wound healing. Rickets is a Vitamin D deficiency, beriberi a Vitamin B1 deficiency, and night blindness a Vitamin A deficiency.

2. What is the normal human body temperature in degrees Celsius?

• A. 35 °C
• B. 37 °C
• C. 39 °C
• D. 41 °C

Explanation: Normal human body temperature is approximately 37 °C, which equals 98.6 °F. Converting between the two uses F = (C × 9/5) + 32, a calculation that itself appears regularly in everyday science sections.

3. Which blood group is known as the universal donor?

• A. AB positive
• B. A negative
• C. O negative
• D. B positive

Explanation: O negative red cells carry neither A nor B antigens nor the Rh D antigen, so they can be transfused to a recipient of any blood group in an emergency. AB positive is the universal recipient, for the mirror-image reason.

4. Which vitamin is primarily produced in the skin in response to sunlight?

• A. Vitamin A
• B. Vitamin C
• C. Vitamin D
• D. Vitamin K

Explanation: Ultraviolet B radiation acts on a cholesterol-related compound in the skin to begin vitamin D production. Vitamins A, C, and K are obtained mainly through diet or other body processes rather than sunlight-driven skin synthesis.

5. Which of the following is a focus area of bacteriology?

• A. Study of viruses
• B. Study of fungi
• C. Structure, genetics, and ecology of bacteria
• D. Study of parasites

Explanation: Bacteriology examines bacteria, including their structure, genetics, physiology, and ecological relationships. Virology, mycology, and parasitology instead focus on viruses, fungi, and parasites respectively.

6. What is the study of bacteria called?

• A. Virology
• B. Mycology
• C. Bacteriology
• D. Parasitology

Explanation: The study of bacteria is called bacteriology. Virology studies viruses, mycology studies fungi, and parasitology studies parasites.

7. Pollination of flowers by birds is called:_________?

• A. Aeverology
• B. Ornithology
• C. Ornithophily
• D. Polligramy

Explanation: Ornithophily is pollination carried out by birds, from ornithos meaning bird and phily meaning attraction or affinity. Ornithology is the scientific study of birds, not pollination by them.

8. What does HMPV stand for?

• A. Human Metapneumo virus
• B. Human Mycoplasma Virus
• C. Human Multipathogen Virus
• D. Human Molecular Virus

Explanation: HMPV expands to human metapneumovirus, a respiratory virus that can cause cold-like illness and more serious infections. Option a uses the same name with minor spacing and wording variation.

9. Primatology is the study of: _________?

• A. Human Behavior
• B. Primates
• C. Animals and Plants
• D. Forests

Explanation: Primatology is the branch of zoology concerned with primates, including lemurs, monkeys, apes and humans. It covers their evolution, behaviour, biology and conservation.

10. Paleontology is the study of: _____________?

• A. Organic particles in the air
• B. Ancient Life and Fossils
• C. How bodily structures are put together in an organism
• D. How living things interact with each other and their environment

Explanation: Paleontology studies ancient life mainly through fossils and other preserved remains or traces. Ecology, by contrast, studies how living things interact with one another and their environment.