Question 1

How much more available to the body is synthetic folate than naturally occurring folate?

Accepted Answer

A)   0.7 times
B)   1.2 times
C)   1.5 times
D)   1.7 times
E)   2.5 timesF) A) and B)
G) C) and D)

Question 2

Which of the following functions is true of vitamins in general?

Accepted Answer

A)   Some yield energy.
B)   They help enzymes participate in the release of energy from carbohydrates, proteins, and fats.
C)   They are considered macronutrients.
D)   Structurally, they are linked together.
E)   They are not as readily available in food as carbohydrates, fats, and proteins.F) None of the above
G) D) and E)

Question 3

A deficiency of riboflavin can cause a disease known as __________.

Accepted Answer

A)   riboflavinosis
B)   ariboflavinosis
C)   pernicious anemia
D)   pellagra
E)   beriberiF) B) and E)
G) C) and D)

Question 4

Riboflavin is similar to thiamin in that _____.

Accepted Answer

A)   both are found in abundant amounts in pork
B)   both serve as coenzymes in energy metabolism
C)   both are easily destroyed by heat
D)   both are easily destroyed by ultraviolet light
E)   though rare, both can be toxic when consumed in high amountsF) All of the above
G) C) and E)

Question 5

Why is milk sold in cardboard or opaque plastic containers, instead of clear glass bottles?

Accepted Answer

A)   to prevent the amino acid content from being destroyed by UV light
B)   to prevent vitamin A from being destroyed by UV light
C)   to prevent thiamin from being destroyed by UV light
D)   to prevent riboflavin from being destroyed by UV light
E)   to prevent vitamin C from being destroyed by UV lightF) A) and E)
G) A) and C)

Question 6

Which of the following is true of niacin?

Accepted Answer

A)   Large doses of the nicotinic acid form can raise HDL cholesterol.
B)   Large doses of the nicotinic acid form can raise LDL cholesterol.
C)   Treatment for the deficiency disease, pellagra, often includes supplements of the amino acid leucine.
D)   Toxicity is unknown.
E)   High doses can treat liver diseases.F) All of the above
G) A) and D)

Question 7

Which of the following is true of vitamin B  6  ?

Accepted Answer

A)   Toxicity is unknown.
B)   Deficiency is unknown.
C)   It occurs in three forms.
D)   It is stable in heat.
E)   Larger doses can enhance muscle strength.F) B) and D)
G) None of the above

Question 8

Which group is more prone to vitamin B  12  deficiency?

Accepted Answer

A)   older adults
B)   teenagers
C)   infants
D)   cigarette smokers
E)   athletesF) B) and D)
G) C) and D)

Question 9

What is meant by the bioavailability of a vitamin? How is it determined?

Accepted Answer

Some water-soluble vitamins are synthesi...

Question 10

The RDA for vitamin C _____.

Accepted Answer

A)   is the same for men and women
B)   can be met in one serving of many fruits and vegetables
C)   is 60 milligrams a day for women
D)   is based on iron requirements
E)   is slightly lower for cigarette smokersF) C) and E)
G) A) and B)

Question 11

Of these foods, which has the greatest vitamin B  12  bioavailability?

Accepted Answer

A)   milk
B)   eggs
C)   meat
D)   poultry
E)   spirulina (sea algae) F) A) and D)
G) C) and D)

Question 12

What is the main cause of vitamin B  12  deficiency?

Accepted Answer

A)   inadequate intake
B)   poor absorption
C)   impaired folate metabolism
D)   excessive intrinsic factor
E)   weight lossF) B) and C)
G) D) and E)

Question 13

High intakes of folate can mask a deficiency of which nutrient?

Accepted Answer

A)   iron
B)   vitamin A
C)   thiamin
D)   potassium
E)   vitamin B  12 F) All of the above
G) B) and D)

Question 14

Describe the roles that vitamin C performs-or may perform-in the body.

Accepted Answer

As an antioxidant: Vitamin C loses elect...

Question 15

Why is folate supplementation recommended for women 1 month before conception and during the first trimester of pregnancy?

Accepted Answer

A)   to reduce the risk of gestational diabetes
B)   to prevent severe morning sickness
C)   to prevent neural tube defects, such as spina bifida, which may occur during the early weeks of pregnancy.
D)   to help reduce the risk of iron-deficient anemia.
E)   to help ensure a healthy maternal weight gain during pregnancy.F) C) and E)
G) B) and E)

Question 16

Fortification of grain products with folate has helped reduce the prevalence rate of neural tube defects, as well as the prevalence of _______.

Accepted Answer

A)   heart attacks
B)   macrocytic anemia
C)   strokes
D)   some cancers
E)   blood clotsF) A) and C)
G) B) and C)

Question 17

Which of the following is NOT true of folate?

Accepted Answer

A)   It comes in two forms.
B)   It is involved in DNA synthesis.
C)   Its bioavailability is the same whatever the source.
D)   It is involved in converting vitamin B  12  to one of its coenzyme forms.
E)   It regenerates the amino acid methionine from homocysteine.F) C) and D)
G) C) and E)

Question 18

What is "niacin flush"?

Accepted Answer

A)   a condition that develops with niacin deficiency
B)   a condition that develops with nicotinic deficiency
C)   a condition of low levels of niacin in the blood
D)   a pharmacological effect that occurs from taking large doses of supplemental or prescription niacin
E)   a physiological effect that occurs from consuming large doses of the nicotinamide form of niacinF) C) and D)
G) A) and E)

Question 19

Which of the following vitamins is known to be toxic in large doses?

Accepted Answer

A)   niacin
B)   biotin
C)   riboflavin
D)   vitamin B  12 
E)   thiaminF) B) and D)
G) D) and E)

Question 20

Of these foods, which is the best source of niacin?

Accepted Answer

A)   carrots
B)   broccoli
C)   chicken breast
D)   strawberries
E)   orangesF) None of the above
G) A) and D)

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

Which of the following is NOT true of folate?

Correct AnswerverifiedShow Answer

How much more available to the body is synthetic folate than naturally occurring folate?

Correct AnswerverifiedShow Answer

Riboflavin is similar to thiamin in that _____.

Correct AnswerverifiedShow Answer

Of these foods, which is the best source of niacin?

Correct AnswerverifiedShow Answer

Why is milk sold in cardboard or opaque plastic containers, instead of clear glass bottles?

Correct AnswerverifiedShow Answer

Which of the following is true of vitamin B 6 ?

Correct AnswerverifiedShow Answer

What is the main cause of vitamin B 12 deficiency?

Correct AnswerverifiedShow Answer

Describe the roles that vitamin C performs-or may perform-in the body.

Correct AnswerverifiedAs an antioxidant: Vitamin C loses elect...View AnswerShow Answer

The RDA for vitamin C _____.

Correct AnswerverifiedShow Answer

Of these foods, which has the greatest vitamin B 12 bioavailability?

Correct AnswerverifiedShow Answer

Which of the following is true of niacin?

Correct AnswerverifiedShow Answer

What is "niacin flush"?

Correct AnswerverifiedShow Answer

Which of the following functions is true of vitamins in general?

Correct AnswerverifiedShow Answer

Fortification of grain products with folate has helped reduce the prevalence rate of neural tube defects, as well as the prevalence of _______.

Correct AnswerverifiedShow Answer

Why is folate supplementation recommended for women 1 month before conception and during the first trimester of pregnancy?

Correct AnswerverifiedShow Answer

Which group is more prone to vitamin B 12 deficiency?

Correct AnswerverifiedShow Answer

High intakes of folate can mask a deficiency of which nutrient?

Correct AnswerverifiedShow Answer

What is meant by the bioavailability of a vitamin? How is it determined?

Correct AnswerverifiedSome water-soluble vitamins are synthesi...View AnswerShow Answer

A deficiency of riboflavin can cause a disease known as __________.

Correct AnswerverifiedShow Answer

Which of the following vitamins is known to be toxic in large doses?

Correct AnswerverifiedShow Answer

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Which of the following is true of vitamin B ₆ ?

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What is the main cause of vitamin B ₁₂ deficiency?

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As an antioxidant: Vitamin C loses elect...
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Of these foods, which has the greatest vitamin B ₁₂ bioavailability?

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Which group is more prone to vitamin B ₁₂ deficiency?

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Some water-soluble vitamins are synthesi...
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