Biology ยท General Awareness

Vitamins and Nutrition

1,711 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

Which of the following is a macronutrient?

  1. Vitamin C

  2. Protein

  3. Fiber

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

Macronutrients are nutrients that the body needs in large amounts to provide energy and build and repair tissues. Protein is one of the three macronutrients, along with carbohydrates and fats.

Multiple choice

What are some common nutritional supplements used by athletes?

  1. Creatine

  2. Protein powder

  3. BCAAs

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Creatine, protein powder, and BCAAs are all common nutritional supplements used by athletes.

Multiple choice

Legumes and pulses are a good source of which vitamin?

  1. Vitamin A

  2. Vitamin C

  3. Vitamin B6

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Legumes and pulses are a good source of vitamin B6.

Multiple choice

Which vitamin is essential for the production of rhodopsin, a pigment necessary for night vision?

  1. Vitamin A

  2. Vitamin B12

  3. Vitamin C

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

Vitamin A is essential for the production of rhodopsin, a pigment found in the retina that is responsible for night vision.

Multiple choice

Which nutrient is important for maintaining the health of the cornea, the clear outer layer of the eye?

  1. Vitamin C

  2. Omega-3 fatty acids

  3. Zinc

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

Vitamin C is important for maintaining the health of the cornea, as it is involved in the production of collagen, a protein that gives the cornea its strength and clarity.

Multiple choice

Which nutrient is associated with a reduced risk of age-related macular degeneration (AMD), a leading cause of vision loss in older adults?

  1. Vitamin E

  2. Zinc

  3. Lutein and zeaxanthin

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

Lutein and zeaxanthin, carotenoids found in leafy green vegetables and other foods, are associated with a reduced risk of AMD.

Multiple choice

Which nutrient is important for the production of tears, which help to lubricate and protect the eyes?

  1. Vitamin A

  2. Vitamin B12

  3. Vitamin C

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

Vitamin A is important for the production of tears, as it is involved in the production of mucin, a component of tears that helps to keep the eyes moist.

Multiple choice

Which nutrient is important for maintaining the health of the optic nerve, which transmits visual information from the eye to the brain?

  1. Vitamin B12

  2. Omega-3 fatty acids

  3. Zinc

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

Vitamin B12 is important for maintaining the health of the optic nerve, as it is involved in the production of myelin, a fatty substance that insulates the nerve fibers.

Multiple choice

Which nutrient is associated with a reduced risk of glaucoma, a condition characterized by damage to the optic nerve?

  1. Vitamin E

  2. Zinc

  3. Lutein and zeaxanthin

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

Vitamin E is associated with a reduced risk of glaucoma, as it is an antioxidant that helps to protect the optic nerve from damage.

Multiple choice

Which nutrient is important for maintaining the health of the conjunctiva, the clear membrane that covers the white part of the eye?

  1. Vitamin A

  2. Vitamin B12

  3. Vitamin C

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

Vitamin A is important for maintaining the health of the conjunctiva, as it is involved in the production of mucin, a component of tears that helps to keep the conjunctiva moist.

Multiple choice

Which nutrient is associated with a reduced risk of diabetic retinopathy, a complication of diabetes that can lead to vision loss?

  1. Vitamin E

  2. Zinc

  3. Lutein and zeaxanthin

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

Vitamin C is associated with a reduced risk of diabetic retinopathy, as it is an antioxidant that helps to protect the blood vessels in the retina from damage.

Multiple choice

Which nutrient is important for maintaining the health of the iris, the colored part of the eye?

  1. Vitamin A

  2. Vitamin B12

  3. Vitamin C

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

Vitamin A is important for maintaining the health of the iris, as it is involved in the production of melanin, the pigment that gives the iris its color.

Multiple choice

Which nutrient is associated with a reduced risk of uveitis, an inflammation of the uvea, the middle layer of the eye?

  1. Vitamin E

  2. Zinc

  3. Lutein and zeaxanthin

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

Vitamin E is associated with a reduced risk of uveitis, as it is an antioxidant that helps to protect the uvea from damage.

Multiple choice

Which nutrient is important for maintaining the health of the sclera, the white part of the eye?

  1. Vitamin A

  2. Vitamin B12

  3. Vitamin C

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

Vitamin C is important for maintaining the health of the sclera, as it is involved in the production of collagen, a protein that gives the sclera its strength and structure.

Multiple choice

Which nutrient is associated with a reduced risk of keratoconus, a condition in which the cornea becomes thin and cone-shaped?

  1. Vitamin E

  2. Zinc

  3. Lutein and zeaxanthin

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

Vitamin C is associated with a reduced risk of keratoconus, as it is involved in the production of collagen, a protein that gives the cornea its strength and structure.