Question 1

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 2

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 3

Which disease is caused by niacin deficiency?

Accepted Answer

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

Question 4

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 5

Riboflavin is most easily destroyed when exposed to:

Accepted Answer

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

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

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 8

Pantothenic acid is abundant in:

Accepted Answer

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

Question 9

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 10

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 11

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 12

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

Accepted Answer

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

Question 13

Pantothenic acid forms part of which molecule?

Accepted Answer

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

Question 14

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 15

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 16

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 17

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

Question 18

Vitamin C deficiency causes:

Accepted Answer

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

Question 19

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 20

A common adverse effect of niacin toxicity is:

Accepted Answer

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

Exam 8: The Water-Soluble Vitamins

Choline deficiency may contribute to all of the following EXCEPT:

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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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A common adverse effect of niacin toxicity is:

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The RDA for B₆ in adults ____________ with aging.

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

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

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Riboflavin is most easily destroyed when exposed to:

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Pantothenic acid is abundant in:

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Riboflavin forms active coenzymes that do all the following except:

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Which disease is caused by niacin deficiency?

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

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Pantothenic acid forms part of which molecule?

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Which statement concerning vitamins is incorrect?

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Vitamin C deficiency causes:

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

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

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

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Which lifestyle factor increases the requirement for vitamin C?

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Which is the FALSE statement regarding vitamin C?

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