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In which of the following metabolic pathways are coenzymes required?


A) glycolysis
B) citric acid cycle
C) beta-oxidation
D) electron transport chain
E) All of these answers are correct.

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A characteristic symptom of niacin deficiency is


A) cracks at the corners of the mouth.
B) a purple-red tongue.
C) severe edema.
D) inflammation of the skin after exposure to the sun.

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A painful,red,inflamed tongue is called


A) glossitis.
B) cheilosis.
C) stomatitis.
D) anemia.

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Pyridoxal,pyridoxine,and pyridoxamine are three forms of


A) vitamin B-12.
B) vitamin P.
C) folic acid.
D) vitamin B-6.

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Why are paper and opaque plastic containers used for milk,milk products,and cereals?

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For vitamin B-12 to be absorbed,it must be attached to


A) an incomplete protein.
B) intrinsic factor.
C) bile.
D) the protein portion of its final coenzyme form.

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Individuals most likely to experience poor vitamin B-12 status are


A) elderly adults,due to atrophic gastritis.
B) infants,due to low vitamin B-12 content in breast milk.
C) athletes,due to high vitamin B-12 requirements.
D) pregnant women,due to high vitamin B-12 requirements.

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Pernicious anemia is treated most often by


A) a diet high in milk and dairy products.
B) regular intramuscular injection of vitamin B-12.
C) oral supplementation of iron.
D) eating liver three times a week.

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Match the water-soluble vitamin with its deficiency disease or disorder.

Premises
Vitamin B-12
Vitamin C
Niacin
Thiamin
Folate
Responses
Beriberi
Neural tube defect
Pellagra
Pernicious anemia
Scurvy

Correct Answer

Vitamin B-12
Vitamin C
Niacin
Thiamin
Folate

The cells most sensitive to a deficiency of dietary folate are cells that


A) have a short life span and rapid turnover rate.
B) have to last a lifetime.
C) function in the immune system.
D) are classified as phagocytes.

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Those most likely to experience a biotin deficiency are


A) adolescents with low energy and,thus,low biotin intake.
B) alcoholics with impaired biotin absorption.
C) infants lacking an enzyme required for biotin absorption.
D) All of these choices are accurate.

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The coenzyme forms of niacin include


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

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________ are very large immature red blood cells,which are formed as a result of folate deficiency.


A) Erythrocytes
B) Megaloblasts
C) Lymphocytes
D) Platelets

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A defect in the formation of the neural tube during early fetal development can occur from a lack of


A) biotin.
B) folate.
C) vitamin B-6.
D) choline.

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Vitamin B-12 is absorbed in the


A) stomach.
B) duodenum.
C) jejunum.
D) ileum.

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