81.Which of the following statements reflects our knowledge of water-soluble : 1401643.
81.Which of the following statements reflects our knowledge of water-soluble vitamin toxicity?
a.Toxicity symptoms for vitamin B6 can be severe and irreversible.
b.Toxicity symptoms for vitamin C include constipation and hyperactivity.
c.Toxicities of the B vitamins occur almost as often from foods as from supplements.
d.Toxicity of niacin has been reported in body builders taking large amounts of amino acid supplements.
82.In which of the following ways does alcohol intake have a major effect on vitamin B6 metabolism?
a.Alcohol reduces acetaldehyde formation.
b.Alcohol increases fecal excretion of the vitamin.
c.Alcohol dislodges the PLP coenzyme from its enzyme.
d.Alcohol interferes with synthesis of the PLP coenzyme.
83.What is the adult RDA for vitamin B6?
84.On a per-kcalorie basis, which of the following foods is richest in vitamin B6?
85.Which of the following is an essential nutrient for human beings?
86.Pteroylglutamic acid is known as which of the following?
87.Which of the following is a property of folate in nutrition?
a.It is needed for proper functioning of vitamin B2.
b.It functions primarily in the transfer of amino groups.
c.It requires vitamin B12 for coenzyme of folate to function properly.
d.It requires enzymes in the blood to enhance its absorption from most foods.
88.Which of the following characteristics is shared by vitamin B12 and folate?
a.required for nucleic acid synthesis
b.require intrinsic factors for their release from food proteins
c.found in significant amounts in green leafy vegetables
d.considered problem nutrients for strict vegetarians
89.Which of the following vitamins undergoes significant enterohepatic circulation?
90.Which of the following vitamins is usually found in a form that is bound to one or more glutamic acid molecules in food?