Free Human Body and Health MCQs with Answers

521. Scientist discovered a previously undetected feature of the human Anatomy that could be the largest organ of human body?

• A. Brass
• B. Pectora
• C. Interstitium
• D. Otic

Explanation: The interstitium is a network of fluid-filled spaces in connective tissue that was described as a possible new organ. Its extensive distribution led researchers to suggest that it could be among the body's largest organs.

522. Growth is provided by________?

• A. Protein
• B. Minerals
• C. Vitamins
• D. Carbohydrates

Explanation: Protein supplies amino acids needed to build and repair muscles, tissues and enzymes, so it is especially associated with body growth. Carbohydrates mainly provide energy, while vitamins and minerals regulate body processes.

523. Deficiency of Iodine causes:____________?

• A. Anemia
• B. Scurvy
• C. Goiter
• D. Rickets

Explanation: Iodine is required to make thyroid hormones, and severe deficiency enlarges the thyroid gland, producing goiter. Anemia, scurvy and rickets are mainly linked with deficiencies of iron, vitamin C and vitamin D respectively.

524. Which of the following is not a water soluble vitamin?

• A. Tocopherol
• B. Pyridoxine
• C. Pantothenic acid
• D. Niacin

Explanation: Tocopherol is vitamin E, a fat-soluble vitamin stored in body fat. Pyridoxine, pantothenic acid and niacin are water-soluble B vitamins.

525. The vitamin Folate works together with __________ to produce new red blood cells?

• A. Vitamin D
• B. Vitamin A
• C. Vitamin B-12
• D. None of the above

Explanation: Folate and vitamin B12 work together in DNA synthesis and the formation of healthy red blood cells. A deficiency of either can produce megaloblastic anaemia.

526. Common food sources of Vitamin A are:___________?

• A. Milk, eggs, butter, cheese, cream, and liver
• B. White sugar, honey, and sugar cane
• C. Broccoli, apricots, cantaloupe, carrots, sweet potato, spinach
• D. Both A and C

Explanation: Vitamin A comes from animal foods such as milk, eggs, butter and liver, while carotenoid precursors occur in carrots, spinach, apricots and sweet potatoes. Therefore both groups listed in A and C are sources.

527. Which of the following is a function of Vitamin A in the body?

• A. Vision, bone and body growth
• B. Immune defenses, maintenance of body linings and skin
• C. Normal cell development and reproduction
• D. All of the above

Explanation: Vitamin A supports vision, growth, immune defence, healthy skin and body linings, cell development and reproduction. Since all three statements describe its functions, the combined option is correct.

528. Vitamin C deficiency leads to:____________?

• A. Scurvy
• B. Cold
• C. Cancer
• D. Rickets

Explanation: Vitamin C is needed for collagen formation and healthy connective tissue; severe deficiency causes scurvy, with bleeding gums and poor wound healing. Rickets is linked mainly to vitamin D deficiency.

529. The volume of Blood in a Human body to be approximately _________ of body weight?

• A. 6%
• B. 7%
• C. 8%
• D. 9%Biological Sciences

Explanation: An average adult has about 7% of body weight as blood, although the proportion varies with age, sex and body composition. This corresponds to roughly 5 litres in a typical adult.

530. Lack of _______ causes diabetes?

• A. Vitamins
• B. Sugar
• C. Insulin
• D. Calcium

Explanation: Insulin, produced by the pancreas, helps body cells absorb glucose from the blood. A lack of insulin, or resistance to its action, causes diabetes and leads to high blood sugar.