Question 1

The RDA for B₆ in adults ____________ with aging.

Accepted Answer

A)  increases
B)  decreases
C)  stays the same
D)  increases for males but decreases for females

Question 2

A common adverse effect of niacin toxicity is:

Accepted Answer

A)  dermatitis.
B)  flushing of the skin.
C)  dementia.
D)  hives.

Question 3

Vitamin C deficiency causes:

Accepted Answer

A)  bleeding gums.
B)  hemolysis.
C)  pernicious anemia.
D)  megaloblastic anemia.

Question 4

The role of folate in DNA synthesis makes it particularly important in:

Accepted Answer

A)  lipid synthesis.
B)  rapidly dividing cells.
C)  nerve cells.
D)  old age.

Question 5

Beriberi is a disease caused by lack of ________ in the diet.

Accepted Answer

A)  riboflavin
B)  thiamin
C)  vitamin C
D)  niacin

Question 6

Which statement concerning vitamins is incorrect?

Accepted Answer

A)  Vitamins are organic compounds.
B)  If a vitamin is not provided by the diet,the body will synthesize it.
C)  The vitamin content of a food may be affected by cooking and processing.
D)  Vitamins are essential for growth,reproduction and health.

Question 7

Elevated homocysteine is associated with increased risk of cardiovascular disease.In clinical studies,which vitamins have been shown to decrease homocysteine levels in the blood?

Accepted Answer

A)  Vitamins A,C & E
B)  Riboflavin,A & folate
C)  B₆,folate & B₁₂
D)  Pantothenic acid,riboflavin & biotin

Question 8

When the vitamins lost in grain processing are restored,which is a nutrient typically NOT added back?

Accepted Answer

A)  Iron
B)  Thiamin
C)  Pantothenic acid
D)  Riboflavin

Question 9

Which disease is caused by niacin deficiency?

Accepted Answer

A)  Beriberi
B)  Scurvy
C)  Pellagra
D)  None of the above

Question 10

Choline deficiency may contribute to all of the following EXCEPT:

Accepted Answer

A)  neurological disorders.
B)  development of diabetes.
C)  atherosclerosis.
D)  liver disease.

Question 11

Pantothenic acid is abundant in:

Accepted Answer

A)  raw spinach.
B)  sunflower seeds.
C)  apples.
D)  All of the above.

Question 12

Which of the following is NOT recognized as a major function of vitamin C in the body?

Accepted Answer

A)  Formation of collagen
B)  Facilitating release of energy from glucose
C)  Protection against damage from free radicals
D)  Enhancing iron absorption

Question 13

Biotin is tightly bound by avidin,which prevents absorption of the vitamin.Avidin is commonly found in:

Accepted Answer

A)  egg whites.
B)  kidney beans.
C)  peanuts.
D)  spinach.

Question 14

Which lifestyle factor increases the requirement for vitamin C?

Accepted Answer

A)  Drinking alcohol
B)  Exercising frequently and intensely
C)  Smoking cigarettes
D)  Eating a diet high in fiber

Question 15

Riboflavin is most easily destroyed when exposed to:

Accepted Answer

A)  light.
B)  vitamin C.
C)  oxygen.
D)  acid.

Question 16

Pantothenic acid forms part of which molecule?

Accepted Answer

A)  Coenzyme A
B)  Flavinadenine dinucleotide
C)  Pyridoxal phosphate
D)  Adenosine triphosphate

Question 17

Riboflavin forms active coenzymes that do all the following except:

Accepted Answer

A)  assist with energy production from carbohydrates,proteins and fats.
B)  function as electron carriers.
C)  participate in the citric acid cycle.
D)  relay signals between nerve cells.

Question 18

Meeting vitamin B₁₂ needs from the diet is especially difficult for:

Accepted Answer

A)  athletes undergoing rigorous training.
B)  infants.
C)  vegans.
D)  pregnant women.

Question 19

Which is the FALSE statement regarding vitamin C?

Accepted Answer

A)  Vitamin C may decrease the duration of the common cold.
B)  People prone to developing certain types of kidney stones should avoid vitamin C supplementation.
C)  Vitamin C is efficiently stored in the liver,so deficiency symptoms take weeks or months to develop.
D)  Vitamin C supplements are unlikely to cause toxicity.

Question 20

Which of the following does NOT affect thiamin availability in food?

Accepted Answer

A)  Presence of other vitamins
B)  Enzymes found in raw fish
C)  Compounds found in blueberries,tea and coffee
D)  Heat,as generated in cooking

Exam 8: The Water-Soluble Vitamins

The role of folate in DNA synthesis makes it particularly important in:

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Riboflavin is most easily destroyed when exposed to:

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Which of the following is NOT recognized as a major function of vitamin C in the body?

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Biotin is tightly bound by avidin,which prevents absorption of the vitamin.Avidin is commonly found in:

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The RDA for B₆ in adults ____________ with aging.

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Which statement concerning vitamins is incorrect?

Correct AnswerverifiedShow Answer

Pantothenic acid forms part of which molecule?

Correct AnswerverifiedShow Answer

Which lifestyle factor increases the requirement for vitamin C?

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Elevated homocysteine is associated with increased risk of cardiovascular disease.In clinical studies,which vitamins have been shown to decrease homocysteine levels in the blood?

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Riboflavin forms active coenzymes that do all the following except:

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Pantothenic acid is abundant in:

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Choline deficiency may contribute to all of the following EXCEPT:

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Which is the FALSE statement regarding vitamin C?

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A common adverse effect of niacin toxicity is:

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Beriberi is a disease caused by lack of ________ in the diet.

Correct AnswerverifiedShow Answer

Which disease is caused by niacin deficiency?

Correct AnswerverifiedShow Answer

When the vitamins lost in grain processing are restored,which is a nutrient typically NOT added back?

Correct AnswerverifiedShow Answer

Meeting vitamin B₁₂ needs from the diet is especially difficult for:

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Which of the following does NOT affect thiamin availability in food?

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Vitamin C deficiency causes:

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