Which of the following vitamins has been noted as preventing the oxidation of low-density lipoproteins?
a. A
b. E
c. K
d. D2
e. D3
Q. 2The main function of vitamin E in the body is to act as a(n)
a. peroxide.
b. coenzyme.
c. antioxidant.
d. free radical.
e. immune stimulant.
Q. 3How is vitamin E thought to play a role in reducing the risk of heart disease?
a. It inhibits absorption of dietary cholesterol.
b. It slows oxidation of low-density lipoproteins.
c. It interferes with cholesterol synthesis by the liver.
d. It speeds removal of blood cholesterol by the liver.
e. It enhances the inflammatory response.
Q. 4What is the Recommended Dietary Allowance for vitamin D in individuals around 20 years of age?
a. 5 g
b. 10 g
c. 15 g
d. 20 g
e. 50 g
Q. 5Which of the following is a naturally occurring food source of vitamin D?
a. Egg yolks
b. Red meats
c. Tomato juice
d. Whole-wheat bread
e. Egg whites
Q. 6Absorption efficiency of vitamin D supplements is markedly improved when they are taken
a. with a large meal.
b. with a small meal.
c. with orange juice.
d. on an empty stomach.
e. with milk.
Q. 7Which of the following is the most reliable source of vitamin D in the diet?
a. Meat
b. Fortified milk
c. Fruits and vegetables
d. Enriched breads and cereals
e. Whole grains
Q. 8Which of the following is a feature of vitamin D synthesis?
a. Tanning lamps and tanning booths do not stimulate vitamin D synthesis.
b. Sunscreens with sunburn protection factors of 2 and above prevent synthesis of vitamin D.
c. The ultraviolet rays of the sun are able to easily pierce heavy clouds and smog to promote vitamin D synthesis.
d. Dark-skinned people require longer sunlight exposure than light-skinned people to synthesize equivalent amounts of vitamin D
e. The risks of skin cancer often outweigh the benefits of sun exposure for very light-skinned people.
Q. 9Which of the following enables much of the world's population to maintain adequate vitamin D status?
a. Outdoor exposure of the skin to sunlight
b. Wide availability of low-cost fish products
c. Wide availability of food assistance programs
d. World Health Organization distribution of vitamin D capsules
e. Genetically modified crops such as Golden Rice
Quick Reply
