Question 1

A nutrient that has been deemed essential but has not been classified as a vitamin is

Accepted Answer

A)   alpha-tocopherol.
B)   beta-carotene.
C)   choline.
D)   pyridoxine.E) A) and D)
F) B) and D)

Question 2

Antioxidants

Accepted Answer

A)   promote the formation of free radicals.
B)   donate electrons to free radicals.
C)   are reduced in chemical reactions.
D)   damage cell membranes.E) A) and D)
F) A) and C)

Question 3

Niacin is necessary to prevent the disease

Accepted Answer

A)   pernicious anemia.
B)   beriberi.
C)   scurvy.
D)   pellagra.E) C) and D)
F) A) and B)

Question 4

Biotin absorption is inhibited by

Accepted Answer

A)   phytate.
B)   oxalate.
C)   avidin.
D)   copper.E) None of the above
F) A) and B)

Question 5

Immediately after absorption from the small intestine, fat-soluble vitamins appear in the lymph as part of

Accepted Answer

A)   chylomicrons.
B)   HDLs.
C)   phospholipids.
D)   VLDLs.E) None of the above
F) C) and D)

Question 6

Vitamin E functions as a(n)

Accepted Answer

A)   coenzyme.
B)   antioxidant.
C)   hormone.
D)   enzyme.E) All of the above
F) A) and D)

Question 7

Vitamin C is a ______-soluble vitamin.

Accepted Answer

A)   fat
B)   waterContent for... #44Learning Outcome: 08.14 Describe the functions of vitamin C as well as its dietary requirements, sources, and deficiency and toxicity signs and symptoms.C) A) and B)
D) undefined

Question 8

Which of the following is not a role of choline in human health?

Accepted Answer

A)   Structure of cell membranes
B)   Synthesis of hemoglobin
C)   Transport of lipids
D)   Synthesis of neurotransmittersE) C) and D)
F) B) and C)

Question 9

Acquiring sufficient vitamin B-12 from the diet may be a problem for vegans because

Accepted Answer

A)   protein deficiency limits synthesis of intrinsic factor.
B)   it is only found in animal products.
C)   they lack the R-protein in the stomach.
D)   phytic acid in vegetable proteins may inhibit its absorption.E) All of the above
F) A) and B)

Question 10

Which of the following snacks provides the most vitamin C?

Accepted Answer

A)   Vanilla ice cream topped with sliced strawberries
B)   Whole wheat crackers with peanut butter
C)   Baked apples with cinnamon and brown sugar
D)   Grilled cheese sandwichE) A) and C)
F) B) and D)

Question 11

The B vitamins

Accepted Answer

A)   facilitate chemical reactions that yield energy from the macronutrients.
B)   provide strength and stability to bones.
C)   protect the cells from damage by free radicals.
D)   can be broken down to yield about 4 kcal per gram.E) C) and D)
F) A) and C)

Question 12

Choline is a precursor for several

Accepted Answer

A)   lipoproteins.
B)   phospholipids.
C)   fatty acids.
D)   sterols.E) B) and C)
F) All of the above

Question 13

In order to adequately absorb vitamin B-12, we need all of the following EXCEPT

Accepted Answer

A)   intrinsic factor.
B)   an acid environment in the stomach.
C)   B-12 to be bound to food protein.
D)   a healthy ileum.E) C) and D)
F) B) and D)

Question 14

The abnormal red blood cells seen in pernicious anemia are due to

Accepted Answer

A)   inadequate folate intake.
B)   inadequate folate absorption.
C)   inadequate B-12 intake.
D)   inadequate B-12 absorption.E) None of the above
F) A) and D)

Question 15

Which of the following does NOT describe fat-soluble vitamins?

Accepted Answer

A)   They are stored in the body.
B)   Excesses are excreted in the urine.
C)   They are transported via special carriers in the bloodstream.
D)   They tend to exist in several biologically active forms.E) A) and C)
F) A) and B)

Question 16

All of the following people are at risk for vitamin E deficiency except

Accepted Answer

A)   those who follow a vegetarian diet.
B)   those who smoke cigarettes.
C)   premature infants.
D)   people with fat malabsorption.E) B) and C)
F) A) and C)

Question 17

Consumption of vitamin C

Accepted Answer

A)   enhances absorption of iron.
B)   limits absorption of iron.
C)   does not affect absorption of iron.D) B) and C)
E) A) and C)

Question 18

An important role of vitamin K is the synthesis of

Accepted Answer

A)   alpha-tocopherol.
B)   rhodopsin.
C)   retinol.
D)   prothrombin.E) B) and C)
F) C) and D)

Question 19

Which of the B vitamins contains cobalt?

Accepted Answer

A)   Niacin
B)   Thiamin
C)   Vitamin B-6
D)   Vitamin B-12E) B) and C)
F) B) and D)

Question 20

______ is unique among the B vitamins because bacterial synthesis of the vitamin contributes to meeting human needs.

Accepted Answer

A)   Folate
B)   Vitamin B-6
C)   Pantothenic acid
D)   BiotinE) B) and C)
F) A) and B)

Exam 8: Vitamins

All of the following people are at risk for vitamin E deficiency except

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______ is unique among the B vitamins because bacterial synthesis of the vitamin contributes to meeting human needs.

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Which of the following snacks provides the most vitamin C?

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An important role of vitamin K is the synthesis of

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Immediately after absorption from the small intestine, fat-soluble vitamins appear in the lymph as part of

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Biotin absorption is inhibited by

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Which of the B vitamins contains cobalt?

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Vitamin C is a ______-soluble vitamin.

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Choline is a precursor for several

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The B vitamins

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In order to adequately absorb vitamin B-12, we need all of the following EXCEPT

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The abnormal red blood cells seen in pernicious anemia are due to

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Niacin is necessary to prevent the disease

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Consumption of vitamin C

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Vitamin E functions as a(n)

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Antioxidants

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A nutrient that has been deemed essential but has not been classified as a vitamin is

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Which of the following does NOT describe fat-soluble vitamins?

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Which of the following is not a role of choline in human health?

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Acquiring sufficient vitamin B-12 from the diet may be a problem for vegans because

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