Question 1

The B-vitamin most easily destroyed by exposure to light is

Accepted Answer

A)   biotin.
B)   niacin.
C)   riboflavin.
D)   thiamin.E) B) and D)
F) All of the above

Question 2

Persons who smoke have an increased need for

Accepted Answer

A)   vitamin B-12.
B)   vitamin C.
C)   folate.
D)   biotin.E) A) and B)
F) B) and C)

Question 3

Pyridoxal phosphate

Accepted Answer

A)   participates in reactions that synthesize dispensable amino acids.
B)   participates in reactions that synthesize indispensable amino acids.
C)   prevents premenstrual syndrome.
D)   is a natural oral contraceptive.E) B) and C)
F) C) and D)

Question 4

Which group of individuals is advised to consume 400 micrograms of folic acid daily from supplements and/or fortified foods?

Accepted Answer

A)   infants
B)   the elderly
C)   athletes
D)   women capable of becoming pregnantE) A) and C)
F) A) and B)

Question 5

At intakes of supplemental vitamin C greater than 2 g/day,adverse effects,including _________,may occur.

Accepted Answer

A)   blood in the urine and muscle weakness
B)   masking of a vitamin B-12 deficiency
C)   gastrointestinal bloating and diarrhea
D)   All of these choices are accurate.E) B) and D)
F) B) and C)

Question 6

A good way to reduce risk of cardiovascular disease is to take supplements of vitamin B-6,vitamin B-12,folic acid,and vitamin C.

Accepted Answer

A) True 
 B)False

Question 7

The form of folate that is best absorbed is the

Accepted Answer

A)   monoglutamate form found in supplements and fortified foods.
B)   polyglutamate form found naturally in foods.
C)   reduced form found mainly in animal foods.
D)   oxidized form found mainly in plant foods.
E)   None of these answers, as all forms are absorbed equally well.F) D) and E)
G) A) and C)

Question 8

The coenzyme forms of niacin include

Accepted Answer

A)   nicotinic acid and nicotinamide.
B)   FAD and FMN.
C)   NAD and NADP.
D)   ATP and FAD.E) A) and B)
F) A) and C)

Question 9

Large doses of riboflavin are nontoxic.

Accepted Answer

A) True 
 B)False

Question 10

Which of the foods listed below has the lowest niacin bioavailability?

Accepted Answer

A)   wheat
B)   corn
C)   almonds
D)   spinachE) A) and B)
F) C) and D)

Question 11

Intrinsic factor is produced by the

Accepted Answer

A)   beta-cells of the pancreas.
B)   salivary glands.
C)   parietal cells of the stomach.
D)   enterocytes of the small intestine.E) A) and C)
F) B) and C)

Question 12

Megaloblastic anemia develops as a result of deficiencies of ________ and _____.

Accepted Answer

A)   thiamin; riboflavin.
B)   vitamin B-6; folate.
C)   folate; vitamin B-12.
D)   vitamin K; folate.
E)   All of these choices are accurate.F) D) and E)
G) A) and E)

Question 13

The best food sources of vitamin B-6 are

Accepted Answer

A)   meats, fish, and poultry.
B)   milk and dairy products.
C)   carrots, celery, and squash.
D)   enriched breads and cereals.E) B) and D)
F) None of the above

Question 14

Which meal contains the highest amount of vitamin C?

Accepted Answer

A)   Hamburger sandwich, french fries, and cola
B)   Meat loaf, mashed potatoes and gravy, and diet cola
C)   Baked fish with lemon, broccoli, cole slaw, and strawberries
D)   Roast beef, carrots, noodles, and coffeeE) A) and C)
F) A) and B)

Question 15

The nutrients added to enriched grains typically include

Accepted Answer

A)   all of the B vitamins.
B)   vitamin C, pantothenic acid, folic acid, and zinc.
C)   thiamin, riboflavin, niacin, folic acid, and iron.
D)   vitamin B-6, folic acid, vitamin B-12, and iron.E) B) and D)
F) None of the above

Question 16

In general,excess amounts of water-soluble vitamins are excreted via the

Accepted Answer

A)   kidneys.
B)   intestine.
C)   lungs.
D)   skin.E) B) and C)
F) None of the above

Question 17

The fact that the amino acid tryptophan can be converted to niacin by the body explains why

Accepted Answer

A)   diets high in protein could prevent or cure pellagra.
B)   corn-based diets prevent pellagra.
C)   gelatin cures pellagra.
D)   alcoholics sometimes develop Wernicke-Korsakoff syndrome.E) C) and D)
F) A) and D)

Question 18

Which group of foods provides substantial amounts of vitamin C?

Accepted Answer

A)   Citrus fruits and vegetables
B)   Milk and dairy products
C)   Beef, poultry, seafood
D)   Breads and cerealsE) B) and D)
F) B) and C)

Question 19

A diet that provides 75 g protein per day can contribute __________ mg niacin from tryptophan.

Accepted Answer

A)   25
B)   7.5
C)   12.5
D)   <5E) A) and B)
F) All of the above

Question 20

In addition to its role in amino acid metabolism,vitamin B-6 is also required for

Accepted Answer

A)   fatty acid metabolism.
B)   the release of glucose from glycogen.
C)   the electron transport chain.
D)   glycolysis.E) A) and B)
F) All of the above

Exam 13: Water-Soluble Vitamins

A diet that provides 75 g protein per day can contribute __________ mg niacin from tryptophan.

Correct AnswerverifiedShow Answer

Which meal contains the highest amount of vitamin C?

Correct AnswerverifiedShow Answer

In addition to its role in amino acid metabolism,vitamin B-6 is also required for

Correct AnswerverifiedShow Answer

Persons who smoke have an increased need for

Correct AnswerverifiedShow Answer

In general,excess amounts of water-soluble vitamins are excreted via the

Correct AnswerverifiedShow Answer

The fact that the amino acid tryptophan can be converted to niacin by the body explains why

Correct AnswerverifiedShow Answer

Pyridoxal phosphate

Correct AnswerverifiedShow Answer

Which group of foods provides substantial amounts of vitamin C?

Correct AnswerverifiedShow Answer

Megaloblastic anemia develops as a result of deficiencies of ________ and _____.

Correct AnswerverifiedShow Answer

The best food sources of vitamin B-6 are

Correct AnswerverifiedShow Answer

Which of the foods listed below has the lowest niacin bioavailability?

Correct AnswerverifiedShow Answer

Intrinsic factor is produced by the

Correct AnswerverifiedShow Answer

At intakes of supplemental vitamin C greater than 2 g/day,adverse effects,including _________,may occur.

Correct AnswerverifiedShow Answer

The B-vitamin most easily destroyed by exposure to light is

Correct AnswerverifiedShow Answer

The coenzyme forms of niacin include

Correct AnswerverifiedShow Answer

Large doses of riboflavin are nontoxic.

Correct AnswerverifiedShow Answer

The form of folate that is best absorbed is the

Correct AnswerverifiedShow Answer

A good way to reduce risk of cardiovascular disease is to take supplements of vitamin B-6,vitamin B-12,folic acid,and vitamin C.

Correct AnswerverifiedShow Answer

The nutrients added to enriched grains typically include

Correct AnswerverifiedShow Answer

Which group of individuals is advised to consume 400 micrograms of folic acid daily from supplements and/or fortified foods?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Megaloblastic anemia develops as a result of deficiencies of ____ and _.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified