Question 1

What vitamin is involved intensively in amino acid metabolism?

Accepted Answer

A)  Biotin
B)  Vitamin A
C)  Vitamin B6
D)  Riboflavin

Question 2

Which of the following is a characteristic of thiamin nutrition?

Accepted Answer

A)  The coenzyme contains pyrosulfate
B)  It is required for regeneration of folate
C)  It is required for regeneration of niacin
D)  It is an integral part of the nerve cell membrane D

Question 3

Nutrient supplements known as "green pills" often contain

Accepted Answer

A)  mostly food coloring.
B)  high-potency vitamin C.
C)  dehydrated alfalfa and parsley.
D)  dried extracts of spoiled meats.

Question 4

Pernicious anemia results from a combination of lack of intrinsic factor and

Accepted Answer

A)  ariboflavonosis.
B)  lack of hydrochloric acid.
C)  lack of pancreatic vitaminases.
D)  pharmacologic intakes of folate. B

Question 5

Which of the following statements is representative of vitamin supplementation practices?

Accepted Answer

A)  Most people who take supplements consume a poor diet
B)  Most people should take supplements daily because of the great difficulty in obtaining the needed amounts from food
C)  People who have low energy intakes or are pregnant are at risk for developing deficiencies and may benefit from supplementation
D)  People should take supplements daily because nutrition surveys in the U.S.and Canada have detected deficiencies in some population groups

Question 6

Which of the following is an early sign of vitamin C deficiency?

Accepted Answer

A)  Bleeding gums
B)  Pernicious anemia
C)  Appearance of a cold
D)  Hysteria and depression

Question 7

Which of the following is a feature of vitamin B12 nutrition?

Accepted Answer

A)  Deficiencies lead to "wet" beriberi
B)  Even marginal deficiency impairs cognitive function
C)  Excess intake leads to loss of appetite and constipation
D)  Severe deficiency is characterized chiefly by free-radical damage

Question 8

Which of the following is a feature of vitamin C in the body?

Accepted Answer

A)  Severe deficiency is irreversible
B)  Low levels are found in people who chew tobacco
C)  Extremes of physical stress impair mobilization of vitamin C
D)  Severe deficiency signs become apparent when blood levels fall by about 20% B

Question 9

Which of the following statements reflects our knowledge of water-soluble vitamin toxicity?

Accepted Answer

A)  Toxicity symptoms for vitamin B6 can be severe and irreversible
B)  Toxicity symptoms for vitamin C include constipation and hyperactivity
C)  Toxicities of the B vitamins occur almost as often from foods as from supplements
D)  Toxicity of niacin has been reported in body builders taking large amounts of amino acid supplements

Question 10

Which of the following is required for the absorption of dietary vitamin B12?

Accepted Answer

A)  Bile
B)  Lipase
C)  Intrinsic factor
D)  Carboxypeptidase

Question 11

Which of the following food groups is a rich source of vitamin C?

Accepted Answer

A)  Milk group
B)  Meat group
C)  Fruit group
D)  Grains group

Question 12

All of the following are features of vitamin B6 metabolism EXCEPT

Accepted Answer

A)  a deficiency or toxicity leads to depression.
B)  its destruction and excretion are promoted by alcohol intake.
C)  it functions primarily as the coenzyme pyridoxal phosphate.
D)  it enhances physical performance when supplied at a level of l mg/g of dietary protein.

Question 13

What is the adult RDA for vitamin B6?

Accepted Answer

A)  1.3 mg/day
B)  5.5 mg/day
C)  15 mg/day
D)  22 mg/day

Question 14

What is the function of intrinsic factor in vitamin B12 absorption?

Accepted Answer

A)  It catalyzes release of the vitamin from its protein-bound form
B)  It attaches to the vitamin,thereby allowing absorption from the small intestine
C)  It acts as a storage protein for the vitamin within the intestinal epithelial cells
D)  It acts as a cofactor for mucosal enzymes involved in absorption of the vitamin

Question 15

How many dietary folate equivalents are provided by 100 µg of a folate supplement?

Accepted Answer

A)  50
B)  70
C)  133
D)  170

Question 16

Tryptophan can be used in the body to synthesize

Accepted Answer

A)  FAD.
B)  biotin.
C)  niacin.
D)  inositol.

Question 17

What is the primary excretory route for the water-soluble vitamins?

Accepted Answer

A)  Bile
B)  Kidney
C)  Intestine
D)  Perspiration

Question 18

Which of the following vitamins is known to sustain substantial losses during processing of food?

Accepted Answer

A)  Biotin
B)  Niacin
C)  Vitamin B12
D)  Pantothenic acid

Question 19

In the United States,what is the adult RDA for vitamin C?

Accepted Answer

A)  10-20 mg
B)  50-60 mg
C)  75-90 mg
D)  100-135 mg

Question 20

If a dietary supplement poses a significant risk of illness to consumers,what agency must prove harm before removing the product from the market?

Accepted Answer

A)  FDA
B)  CDC
C)  USDA
D)  USPHS

Exam 10: The Water-Soluble Vitamins: B Vitamins and Vitamin C

What vitamin is involved intensively in amino acid metabolism?

Correct AnswerverifiedShow Answer

Which of the following is a characteristic of thiamin nutrition?

Correct AnswerverifiedD

Nutrient supplements known as "green pills" often contain

Correct AnswerverifiedShow Answer

Pernicious anemia results from a combination of lack of intrinsic factor and

Correct AnswerverifiedB

Which of the following statements is representative of vitamin supplementation practices?

Correct AnswerverifiedShow Answer

Which of the following is an early sign of vitamin C deficiency?

Correct AnswerverifiedShow Answer

Which of the following is a feature of vitamin B12 nutrition?

Correct AnswerverifiedShow Answer

Which of the following is a feature of vitamin C in the body?

Correct AnswerverifiedB

Which of the following statements reflects our knowledge of water-soluble vitamin toxicity?

Correct AnswerverifiedShow Answer

Which of the following is required for the absorption of dietary vitamin B12?

Correct AnswerverifiedShow Answer

Which of the following food groups is a rich source of vitamin C?

Correct AnswerverifiedShow Answer

All of the following are features of vitamin B6 metabolism EXCEPT

Correct AnswerverifiedShow Answer

What is the adult RDA for vitamin B6?

Correct AnswerverifiedShow Answer

What is the function of intrinsic factor in vitamin B12 absorption?

Correct AnswerverifiedShow Answer

How many dietary folate equivalents are provided by 100 µg of a folate supplement?

Correct AnswerverifiedShow Answer

Tryptophan can be used in the body to synthesize

Correct AnswerverifiedShow Answer

What is the primary excretory route for the water-soluble vitamins?

Correct AnswerverifiedShow Answer

Which of the following vitamins is known to sustain substantial losses during processing of food?

Correct AnswerverifiedShow Answer

In the United States,what is the adult RDA for vitamin C?

Correct AnswerverifiedShow Answer

If a dietary supplement poses a significant risk of illness to consumers,what agency must prove harm before removing the product from the market?

Correct AnswerverifiedShow Answer

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D

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B

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Which of the following is a feature of vitamin B₁₂ nutrition?

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B

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Which of the following is required for the absorption of dietary vitamin B₁₂?

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All of the following are features of vitamin B₆ metabolism EXCEPT

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What is the adult RDA for vitamin B₆?

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What is the function of intrinsic factor in vitamin B₁₂ absorption?

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