Which of the following vitamins undergoes significant enterohepatic circulation?
a. Folate
b. Niacin
c. Thiamin
d. Pyridoxine
e. Pantothenic acid
Q. 2Which of the following vitamins is usually found in a form that is bound to one or more pteroylglutamic acid molecules in food?
a. Folate
b. Thiamin
c. Vitamin B6
d. Ascorbic acid
e. Vitamin B12
Q. 3Pteroylglutamic acid is known as
a. folate.
b. choline.
c. inositol.
d. pyridoxamine.
e. niacin.
Q. 4In what major way does alcohol intake affect vitamin B6 metabolism?
a. It reduces acetaldehyde formation.
b. It increases fecal excretion of the vitamin.
c. It dislodges the PLP coenzyme from its enzyme.
d. It interferes with synthesis of the PLP coenzyme.
e. It increases urinary excretion of B6.
Q. 5On a per-kcalorie basis, which of the following foods is richest in vitamin B6?
a. Meats
b. Fruits
c. Legumes
d. Grains
e. Dairy
Q. 6Irreversible nerve damage has been reported in people taking large doses of vitamin
a. B1.
b. B2.
c. B6.
d. B7.
e. B12.
Q. 7Which of the following vitamins is stored primarily in muscle tissue?
a. Biotin
b. Folate
c. Vitamin B6
d. Pantothenic acid
e. Thiamin
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