Question 1

Which of the following is NOT a form of vitamin A?

Accepted Answer

A)  Retinol
B)  Retinal
C)  Retinoic acid
D)  RetinoquinoneE) None of the above
F) C) and D) D

Question 2

The major function of vitamin E is to inhibit the destruction of

Accepted Answer

A)  lysosomes.
B)  free radicals.
C)  mucopolysaccharides.
D)  polyunsaturated fatty acids.E) A) and B)
F) A) and C)

Question 3

Which of the following conditions or diseases are known to be caused by a deficiency of the same nutrient?

Accepted Answer

A)  Osteomalacia and rickets
B)  Xerophthalmia and breath pentane release
C)  Kwashiorkor and fibrocystic breast disease
D)  Hemolytic anemia and large-cell type anemiaE) A) and C)
F) C) and D)

Question 4

Which of the following is a feature of vitamin D synthesis?

Accepted Answer

A)  Tanning lamps and tanning booths do not stimulate vitamin D synthesis
B)  Sunscreens with sunburn protection factors of 2 and above prevent synthesis of vitamin D
C)  The ultraviolet rays of the sun are able to easily pierce heavy clouds and smog to promote vitamin D synthesis
D)  Dark-skinned people require longer sunlight exposure than light-skinned people to synthesize equivalent amounts of vitamin DE) A) and B)
F) All of the above

Question 5

What population group is at highest risk for osteomalacia?

Accepted Answer

A)  Infants
B)  Elderly men
C)  Adult women
D)  Children ages 2-12 yearsE) A) and C)
F) A) and B)

Question 6

What population group is most vulnerable to vitamin A toxicity?

Accepted Answer

A)  Children
B)  Adolescents
C)  Adults
D)  ElderlyE) B) and C)
F) A) and B)

Question 7

Which of the following is a feature of vitamin E?

Accepted Answer

A)  Functions as a hormone-like substance
B)  Toxicity symptoms include bone abnormalities
C)  Deficiencies occur from inability to absorb dietary lipids
D)  Important food sources include enriched breads and pastaE) B) and C)
F) A) and D)

Question 8

How many different forms of vitamin A are active in the body?

Accepted Answer

A)  1
B)  2
C)  3
D)  5E) A) and C)
F) A) and B) C

Question 9

Which of the following is a feature of vitamin E in foods?

Accepted Answer

A)  Vitamin E is fairly stable to heat
B)  Most convenience foods are poor sources of vitamin E
C)  Saturated oils are the major dietary sources of vitamin E
D)  The amount of alpha-tocopherol in foods is underestimatedE) A) and D)
F) A) and B)

Question 10

What do retinal and unsaturated fatty acids have in common?

Accepted Answer

A)  Neither is found in animal fats
B)  Neither is transported by chylomicrons
C)  They may exist in the cis or trans form
D)  They are both needed to prevent erythrocyte hemolysisE) A) and D)
F) A) and B)

Question 11

Which of the following is a feature of vitamin K?

Accepted Answer

A)  A deficiency increases the risk for hemophilia
B)  A deficiency leads to keratinization of the cornea
C)  Bacteria in the intestines synthesize bioavailable vitamin K
D)  There are multiple forms in the diet,of which menadione is the naturally occurring formE) B) and D)
F) A) and B)

Question 12

Which of the following features do vitamins C and E share?

Accepted Answer

A)  Both function as antioxidants
B)  Both require bile for absorption
C)  Neither participates in protein synthesis
D)  Neither is affected by the processing of foodsE) All of the above
F) A) and B)

Question 13

Which of the following is a feature of taking high-dose supplements of vitamin A?

Accepted Answer

A)  They increase teratogenic risk
B)  They are effective in treating acne
C)  They lead to keratinization of tissue
D)  They reduce risk for neural tube defectsE) None of the above
F) C) and D)

Question 14

Studies in developing countries have demonstrated that the mortality rate of children with measles can be significantly reduced by providing supplements of

Accepted Answer

A)  iron.
B)  vitamin A.
C)  folic acid.
D)  phylloquinone.E) B) and C)
F) A) and B) B

Question 15

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

Accepted Answer

A)  Require bile for absorption
B)  Found in the fat and oily parts of foods
C)  Transported permanently to the liver and adipose tissue
D)  Pose a greater risk for developing a toxicity than water-soluble vitaminsE) A) and B)
F) C) and D)

Question 16

Which of the following is a characteristic of vitamin A in foods?

Accepted Answer

A)  Fast foods are generally considered good sources of vitamin A
B)  A regular intake of chicken liver is known to induce toxicity in children
C)  Xanthophylls in certain vegetables can be converted to active vitamin A in the liver
D)  Chlorophyll in vegetables can be converted to active vitamin A in the intestinal cellsE) All of the above
F) B) and C)

Question 17

Of the following,which would most readily induce a vitamin K deficiency?

Accepted Answer

A)  Achlorhydria
B)  Antibiotic therapy
C)  Presence of oxalic acid in food
D)  Insufficient intake of green leafy vegetablesE) A) and C)
F) None of the above

Question 18

Which of the following is NOT known to promote vitamin D deficiency in the elderly?

Accepted Answer

A)  Consumption of little or no milk
B)  Excessive use of hypertension medications
C)  Wearing protective clothing and using sunscreen while outdoors
D)  Diminished capacity of liver and kidney synthesis of activated vitamin DE) B) and C)
F) A) and B)

Question 19

Which of the following is NOT a major target organ for the action of activated vitamin D?

Accepted Answer

A)  Liver
B)  Bone
C)  Kidney
D)  IntestineE) B) and C)
F) All of the above

Question 20

What part of the body is affected most by keratomalacia?

Accepted Answer

A)  Bone
B)  Liver
C)  Cornea
D)  Immune cellsE) None of the above
F) A) and B)

Exam 11: The Fat-Soluble Vitamins: A, d, e, and K

Which of the following is NOT a form of vitamin A?

Correct AnswerverifiedD

The major function of vitamin E is to inhibit the destruction of

Correct AnswerverifiedShow Answer

Which of the following conditions or diseases are known to be caused by a deficiency of the same nutrient?

Correct AnswerverifiedShow Answer

Which of the following is a feature of vitamin D synthesis?

Correct AnswerverifiedShow Answer

What population group is at highest risk for osteomalacia?

Correct AnswerverifiedShow Answer

What population group is most vulnerable to vitamin A toxicity?

Correct AnswerverifiedShow Answer

Which of the following is a feature of vitamin E?

Correct AnswerverifiedShow Answer

How many different forms of vitamin A are active in the body?

Correct AnswerverifiedC

Which of the following is a feature of vitamin E in foods?

Correct AnswerverifiedShow Answer

What do retinal and unsaturated fatty acids have in common?

Correct AnswerverifiedShow Answer

Which of the following is a feature of vitamin K?

Correct AnswerverifiedShow Answer

Which of the following features do vitamins C and E share?

Correct AnswerverifiedShow Answer

Which of the following is a feature of taking high-dose supplements of vitamin A?

Correct AnswerverifiedShow Answer

Studies in developing countries have demonstrated that the mortality rate of children with measles can be significantly reduced by providing supplements of

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

Which of the following is a characteristic of vitamin A in foods?

Correct AnswerverifiedShow Answer

Of the following,which would most readily induce a vitamin K deficiency?

Correct AnswerverifiedShow Answer

Which of the following is NOT known to promote vitamin D deficiency in the elderly?

Correct AnswerverifiedShow Answer

Which of the following is NOT a major target organ for the action of activated vitamin D?

Correct AnswerverifiedShow Answer

What part of the body is affected most by keratomalacia?

Correct AnswerverifiedShow Answer

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C

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B

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