Biology · General Awareness

Vitamins and Nutrition

1,549 Questions

Review essential concepts of human nutrition, focusing on macro and micronutrients. The questions cover vitamin deficiencies, sources, and their physiological roles such as blood clotting and vision. This material is highly relevant for the general science section of various government exams.

Vitamin sources and functionsMacronutrients for energyBlood coagulation vitaminsDeficiency diseasesNutrient absorption mechanisms

Vitamins and Nutrition Questions

Multiple choice

Vitamin B2 is also called :

  1. thiamine

  2. riboflavin

  3. niacine

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vitamin B2 is scientifically known as riboflavin. Thiamine is Vitamin B1, and niacin (not 'niacine') is Vitamin B3. Riboflavin is essential for energy production and cellular function.

Multiple choice

Which of the following is the best source of vitamin A?

  1. Carrot

  2. Jaggery

  3. Ragi

  4. Gooseberries
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Carrots are one of the richest sources of vitamin A (as beta-carotene), which the body converts to retinol. Jaggery provides mainly iron and sucrose, Ragi is rich in calcium and iron, and Gooseberries (amla) are excellent for vitamin C, not vitamin A.

Multiple choice

Which of the following vitamins aids in the absorption of iron?

  1. Vitamin A

  2. Vitamin B

  3. Vitamin C

  4. Vitamin D
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vitamin C significantly enhances non-heme iron absorption by reducing iron to its ferrous (Fe²⁺) form and forming soluble complexes that prevent precipitation. This is why iron-rich foods are best consumed with vitamin C sources like citrus fruits. Vitamins A, B, and D don't have this specific effect on iron absorption.

Multiple choice

Citrus fruits are considered a rich source of which of the following vitamins?

  1. Vitamin A

  2. Vitamin B.

  3. Vitamin C

  4. Vitamin D

  5. Vitamin E
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Citrus fruits like oranges, lemons, and grapefruits are naturally high in Vitamin C (ascorbic acid), which is essential for immune function, collagen synthesis, and wound healing. While other vitamins are present in various fruits, Vitamin C is the defining nutrient characteristic of citrus fruits. Options A, B, D, and E are incorrect as these are not the primary vitamins associated with citrus.

Multiple choice

Which one of the following is known as the virility vitamin?

  1. Vitamin A

  2. Vitamin C

  3. Vitamin E

  4. Vitamin K
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Vitamin E is known as the 'virility vitamin' or 'anti-sterility vitamin' because it plays a crucial role in reproductive health and fertility. Deficiency can lead to reproductive failure.

Multiple choice

Assertion: Human body can synthesize vitamins. Reason: Vitamins are required in small amounts for life growth and health of human beings.

  1. Both A and R are true and R is the correct explanation of A.

  2. Both A and R are true but R is NOT the correct explanation of A.

  3. A is true but R is false.

  4. A is false but R is true.

  5. Both A and R are false.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This option is correct,  because vitamins are not synthesized by the body but have to the supplied in the diet.

Multiple choice

Gnotobiotic techniques have been used to assess the effect of a particular species of microorganisms on a host. Which of the following vitamins is required in higher amounts by gnotobiotic animals as compared to normal mammals?

  1. Vitamin A

  2. Vitamin B

  3. Vitamin C

  4. Vitamin E
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gnotobiotic animals require vitamin B in higher amounts than normal animals. They are free of microbes which can synthesise vitamin B. Thus, they require more vitamin B as compared to normal animals.

Multiple choice

Vitamin C is a water-soluble vitamin necessary for normal growth and development of the body. The potassium salt structurally related to vitamin C is

  1. potassium nitrate

  2. potassium perchlorate

  3. potassium erythorbate

  4. potassium dichromate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Potassium erythorbate (C6H7KO6) is a food additive. Chemically, it is the potassium salt of erythorbic acid. As an antioxidant structurally related to vitamin C, it helps to improve flavour stability and prevents the formation of carcinogenic nitrosamines.

Multiple choice

Cyanocobalamine is

  1. vitamin E

  2. vitamin B1

  3. vitamin B12

  4. vitamin B5
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cyanocobalamin is the chemical name for Vitamin B12, an essential nutrient for nerve function and DNA synthesis. Vitamin E is tocopherol, Vitamin B1 is thiamine, and Vitamin B5 is pantothenic acid - but Cyanocobalamin specifically refers to B12, which contains the mineral cobalt.

Multiple choice

Washing of peeled vegetables removes the vitamin

  1. A

  2. C

  3. D

  4. E
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Vitamin C is water-soluble and readily leaches out of vegetables when they are washed or cooked in water. Peeling vegetables exposes more surface area, and washing them afterward removes significant amounts of this water-soluble vitamin. Fat-soluble vitamins (A, D, E, K) are not removed by washing.