Question 1

Which of the following is true about the forms of vitamin A?

Accepted Answer

A)   Retinoids are found in plant foods.
B)   Carotenoids are found in animal foods.
C)   Carotenoids can be converted to retinoids.
D)   Retinoids can be converted to carotenoids.E) B) and C)
F) B) and D)

Question 2

The vitamin content of foods is diminished by all of the following EXCEPT

Accepted Answer

A)   exposure to light.
B)   cooking in water.
C)   freezing.
D)   alkalinity.E) B) and D)
F) A) and D)

Question 3

Vitamin C appears to reduce the duration of symptoms of __________________by a day or so and to lessen the severity of the symptoms.

Accepted Answer

A)   colds
B)   ear infections
C)   urinary tract infections
D)   the fluE) B) and C)
F) C) and D)

Question 4

Some niacin is formed in the body from

Accepted Answer

A)   phenylalanine.
B)   tyrosine.
C)   tryptophan.
D)   lysine.E) B) and C)
F) C) and D)

Question 5

Which of the following is the best food source of riboflavin?

Accepted Answer

A)   Milk
B)   Lean ham
C)   Carrots
D)   Canola oilE) None of the above
F) A) and B)

Question 6

Beriberi is caused by a _______________ deficiency.

Accepted Answer

A)   thiamin
B)   vitamin B-6
C)   niacin
D)   cholineE) B) and D)
F) None of the above

Question 7

The vitamin that aids in activating fatty acids so they can yield energy is

Accepted Answer

A)   pantothenic acid.
B)   biotin.
C)   vitamin B-6.
D)   thiamin.E) B) and C)
F) A) and D)

Question 8

Water-soluble and fat-soluble vitamins differ in which way?

Accepted Answer

A)   Water-soluble vitamins are best absorbed in the presence of dietary fat.
B)   Fat-soluble vitamins have much less potential for toxicity.
C)   Water-soluble vitamins are stored, whereas fat-soluble vitamins are excreted readily.
D)   Water-soluble are less likely to be toxic.E) A) and B)
F) A) and C)

Question 9

Pantothenic acid is required for the synthesis of

Accepted Answer

A)   coenzyme PA (CoP
A)  .
B)   coenzyme Q (CoQ) .
C)   coenzyme A (Co
A)  .
D)   coenzyme B (Co
B)  .E) A) and D)
F) A) and C)

Question 10

Which fat-soluble vitamin is important for the health of epithelial cells because it promotes mucus production?

Accepted Answer

A)   vitamin A
B)   vitamin E
C)   vitamin C
D)   vitamin DE) A) and D)
F) All of the above

Question 11

Which of the following are the best thiamin sources?

Accepted Answer

A)   Pork, whole grains, enriched cereals, legumes
B)   Root vegetables, cheddar-type cheese, deep yellow/orange fruits and vegetables
C)   Ham, vegetables of the cabbage family, whole grains
D)   Milk, beef, deep yellow/orange fruits and vegetablesE) A) and B)
F) A) and C)

Question 12

Overconsumption of vitamins A and E can do all the following except

Accepted Answer

A)   lead to accumulation in the liver.
B)   result in toxicity.
C)   cure colds and prevent cancer.
D)   lead to debilitating side effects.E) B) and C)
F) A) and C)

Question 13

Megadoses are defined as vitamin intakes ________ times the estimated human needs to prevent a deficiency.

Accepted Answer

A)   1 to 3
B)   3 to 5
C)   2 to 10
D)   50E) B) and C)
F) B) and D)

Question 14

Free radical damage has been implicated in increasing the risk of

Accepted Answer

A)   sinus infections.
B)   HIV.
C)   atherosclerosis.
D)   sickle cell disease.E) C) and D)
F) B) and C)

Question 15

Vitamin C intake over 2 grams per day may cause

Accepted Answer

A)   diarrhea.
B)   liver damage.
C)   beriberi.
D)   rebound scurvy.E) None of the above
F) A) and B)

Question 16

The leading cause of blindness among older Americans is macular degeneration. Eating a diet rich in can decrease the risk of this condition.

Accepted Answer

A)   vitamin A
B)   vitamin E
C)   vitamin C
D)   carotenoidsE) A) and D)
F) A) and C)

Question 17

In general, the richest sources of vitamin E are _______________.

Accepted Answer

A)   green leafy vegetables
B)   plant oils
C)   citrus fruits
D)   yellow and orange vegetablesE) A) and B)
F) A) and C)

Question 18

Most water-soluble vitamins are rapidly excreted from the body when consumed in excess. However, ______ is an example of a water-soluble vitamin that can accumulate to toxic levels in the liver.

Accepted Answer

A)   riboflavin
B)   vitamin C
C)   thiamin
D)   vitamin B-6E) A) and B)
F) C) and D)

Question 19

Vitamin D is converted to its active form by the

Accepted Answer

A)   liver and kidneys.
B)   bones.
C)   pancreas.
D)   skin.E) B) and C)
F) None of the above

Question 20

In milling grains to make refined products, seeds are crushed and the germ, bran, and husk layers are discarded, leaving just the starch-containing _________________ in the refined grains.

Accepted Answer

A)   endosperm
B)   cereal
C)   cellulose
D)   fiberE) C) and D)
F) A) and B)

Exam 8: Vitamins

Beriberi is caused by a _______________ deficiency.

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In general, the richest sources of vitamin E are _______________.

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The leading cause of blindness among older Americans is macular degeneration. Eating a diet rich in can decrease the risk of this condition.

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Vitamin D is converted to its active form by the

Correct AnswerverifiedShow Answer

Which fat-soluble vitamin is important for the health of epithelial cells because it promotes mucus production?

Correct AnswerverifiedShow Answer

Which of the following is true about the forms of vitamin A?

Correct AnswerverifiedShow Answer

The vitamin content of foods is diminished by all of the following EXCEPT

Correct AnswerverifiedShow Answer

Some niacin is formed in the body from

Correct AnswerverifiedShow Answer

Which of the following is the best food source of riboflavin?

Correct AnswerverifiedShow Answer

Vitamin C appears to reduce the duration of symptoms of __________________by a day or so and to lessen the severity of the symptoms.

Correct AnswerverifiedShow Answer

Pantothenic acid is required for the synthesis of

Correct AnswerverifiedShow Answer

Water-soluble and fat-soluble vitamins differ in which way?

Correct AnswerverifiedShow Answer

The vitamin that aids in activating fatty acids so they can yield energy is

Correct AnswerverifiedShow Answer

Which of the following are the best thiamin sources?

Correct AnswerverifiedShow Answer

In milling grains to make refined products, seeds are crushed and the germ, bran, and husk layers are discarded, leaving just the starch-containing _________________ in the refined grains.

Correct AnswerverifiedShow Answer

Free radical damage has been implicated in increasing the risk of

Correct AnswerverifiedShow Answer

Overconsumption of vitamins A and E can do all the following except

Correct AnswerverifiedShow Answer

Megadoses are defined as vitamin intakes ________ times the estimated human needs to prevent a deficiency.

Correct AnswerverifiedShow Answer

Vitamin C intake over 2 grams per day may cause

Correct AnswerverifiedShow Answer

Most water-soluble vitamins are rapidly excreted from the body when consumed in excess. However, ______ is an example of a water-soluble vitamin that can accumulate to toxic levels in the liver.

Correct AnswerverifiedShow Answer

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