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The synthesis of collagen requires both vitamin C and


A) iron.
B) zinc.
C) cobalamin.
D) beta-carotene.

E) All of the above
F) A) and D)

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Which of the following is a feature of vitamins?


A) Many serve in the role of enzyme inhibitors
B) Structurally,many are found linked together
C) Several may be oxidized to yield 4 kcalories per gram
D) The quantities present in foods are measured in micrograms or milligrams

E) A) and B)
F) B) and D)

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Which of the following foods is highest in folate?


A) Meats
B) Starches
C) Dairy products
D) Green,leafy vegetables

E) All of the above
F) A) and D)

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What is the primary chemical reaction in which thiamin participates as a coenzyme?


A) Transfers amine groups in the synthesis of amino acids
B) Transfers hydrogen atoms in the synthesis of erythrocytes
C) Assists in addition of methyl groups to compounds involved in energy metabolism
D) Assists in removal of one-carbon units from compounds involved in energy metabolism

E) A) and D)
F) All of the above

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Which of the following vitamins has an RDA?


A) Biotin
B) Choline
C) Cobalamin
D) Pantothenic acid

E) A) and B)
F) A) and C)

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Which of the following would be a very good source of vitamin C for the lacto-ovo-vegetarian?


A) Milk
B) Eggs
C) Broccoli
D) Whole-grain bread

E) All of the above
F) B) and C)

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What is the most likely explanation for the impaired functioning of the GI tract resulting from folate deficiency?


A) Insufficient bile production,thereby promoting fat malabsorption and diarrhea
B) Reduced mucosal cell replacement,thereby resulting in decreased GI functioning
C) Decreased enzymatic capacity in the intestines,thereby resulting in malabsorption
D) Decreased oxygen supply to body tissues,with the intestines being particularly affected because of their high metabolic activity

E) None of the above
F) B) and D)

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All of the following are consequences of ingesting excess vitamin C supplements EXCEPT


A) they frequently cause diarrhea.
B) they appear safe at levels up to 2000 mg/day.
C) they enhance the action of anticlotting medications.
D) they interfere with laboratory urine tests for the diagnosis of diabetes.

E) A) and D)
F) A) and C)

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How much vitamin C is needed daily to raise blood ascorbic acid concentrations to a maximum?


A) 10 mg
B) 75 mg
C) 125 mg
D) 200 mg

E) B) and D)
F) B) and C)

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Which of the following vitamins is stored primarily in muscle tissue?


A) Biotin
B) Folate
C) Vitamin B6
D) Pantothenic acid

E) B) and C)
F) All of the above

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Which of the following is a property of riboflavin in nutrition?


A) Stability to heat is good
B) Deficiency leads to beriberi
C) Requirements are proportional to body weight
D) Significant amounts are found in citrus products

E) B) and C)
F) C) and D)

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Which of the following is a type of neural tube defect?


A) Scurvy
B) Beriberi
C) Pellagra
D) Spina bifida

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

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What is a precursor?


A) A conditionally essential vitamin
B) A sign or symptom of a vitamin deficiency disorder
C) A substance that is used to synthesize another compound
D) A substance that is recycled through the liver and intestines

E) A) and B)
F) A) and C)

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People with the condition known as iron overload may be adversely affected from taking supplements of


A) niacin.
B) retinol.
C) cobalamin.
D) ascorbic acid.

E) C) and D)
F) B) and C)

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A common drug for the treatment of tuberculosis is known to markedly interfere in the metabolism of vitamin


A) B6.
B) B12.
C) C.
D) D.

E) C) and D)
F) All of the above

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Large doses of nicotinic acid are known to result in all of the following EXCEPT


A) dilation of capillaries.
B) increased HDL cholesterol.
C) lowering of LDL cholesterol.
D) disappearance of learning disorders in children.

E) All of the above
F) B) and C)

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What vitamin deficiency disease appeared in people who had subsisted on a diet high in corn and low in protein?


A) Scurvy
B) Pellagra
C) Wet beriberi
D) Pernicious anemia

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

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Which of the following is NOT among the general characteristics of the fat-soluble vitamins?


A) Excesses are eliminated by the kidneys
B) Absorption is via the lymphatic circulation
C) Several of them require protein carriers for transport
D) They can be stored in relatively large amounts in certain body tissues

E) A) and B)
F) A) and C)

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Which of the following overt side effect(s) is likely to appear after a person ingests a high quantity of nicotinic acid?


A) Constipation
B) Mental confusion
C) Painful,tingling,itching sensation
D) Hair loss,bloating,and photophobia

E) None of the above
F) B) and D)

Correct Answer

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Moderate intakes of which of the following would provide sufficient amounts of vitamin C?


A) Potatoes
B) Brown rice
C) Low-fat milk
D) Whole-wheat bread

E) None of the above
F) B) and D)

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