Free Human Body and Health MCQs with Answers

191. The stomach is the shape like bag?

• A. J Shape
• B. E shape
• C. T shape
• D. None of these

Explanation: The stomach is a muscular, J-shaped sac between the oesophagus and small intestine. Its curved shape allows it to store and mix food.

192. New Born Baby Brain weight is about________?

• A. 300 grams
• B. 400 grams
• C. 250 grams
• D. None of these

Explanation: A newborn baby's brain weighs roughly 300 to 400 grams, so about 400 grams is the closest listed value. The adult brain is much heavier, at approximately 1.3 to 1.4 kilograms.

193. Leprosy is the oldest disease in the world caused by which microorganism?

• A. Virus
• B. Fungi
• C. Bacteria
• D. None

Explanation: Leprosy is caused by the bacterium Mycobacterium leprae, which primarily affects the skin and peripheral nerves. It is therefore bacterial, not viral or fungal.

194. Which of the following vitamin is known as folate?

• A. B-9
• B. B-1
• C. B-6
• D. vitamin-D

Explanation: Folate is vitamin B9, a water-soluble vitamin needed for DNA synthesis and normal red-blood-cell formation. Its deficiency is especially important during pregnancy because it can cause neural-tube defects.

195. The _______ test is a color perception test for red-green color deficiencies.

• A. Hemiplegia
• B. Ishihara
• C. Lalopathy
• D. None of the above

Explanation: The Ishihara test uses coloured-dot plates to detect red-green colour-vision deficiencies. The other options are not standard colour-perception tests.

196. What cells are involved in bone remodeling?

• A. Osteoblasts
• B. Osteoclasts
• C. Osteocytes
• D. All of these

Explanation: Bone remodeling requires osteoclasts to remove old bone, osteoblasts to form new bone, and osteocytes to sense and regulate bone maintenance. Therefore, all three cell types participate.

197. Which of the following vitamin is known as Pyridoxine?

• A. Vitamin B-1
• B. Vitamin B-2
• C. Vitamin B-6
• D. Vitamin B-12

Explanation: Pyridoxine is vitamin B6, involved in amino-acid metabolism and nervous-system function. Vitamin B12 is cobalamin, while B1 and B2 are thiamine and riboflavin.

198. Which of the following vitamin is known as Riboflavin?

• A. vitamin B-1
• B. vitamin B-2
• C. vitamin B-3
• D. vitamin B-6

Explanation: Riboflavin is vitamin B2, a component of coenzymes that help release energy from food. Vitamin B1 is thiamine and vitamin B6 is pyridoxine.

199. Which of the following vitamin is known as Pantothenic acid?

• A. vitamin B-1
• B. vitamin B-2
• C. vitamin B-3
• D. vitamin B-5

Explanation: Pantothenic acid is vitamin B5, needed to make coenzyme A and metabolize carbohydrates, fats, and proteins. The name comes from a Greek word meaning “everywhere” because it occurs widely in foods.

200. Which of the following vitamin is known as Biotin?

• A. vitamin B-3
• B. vitamin B-4
• C. vitamin B-5
• D. vitamin B-7

Explanation: Biotin is vitamin B7, a cofactor for enzymes involved in fatty-acid synthesis and other metabolic reactions. Vitamin B3 is niacin, while B5 is pantothenic acid.