Exam 9: Water-Soluble Vitamins

364 53. Vitamin B₆ functions importantly in all of the following EXCEPT _____.

A major role for thiamin is:

A primary function of vitamin C is to act as an:

Which of the following reflects long-term folate status?

5-methyl THF requires the action of which vitamin in order to form THF?

A consequence of thiamin deficiency is:

350 40. Methionine is used to synthesize S-adenosylmethionine (SAM). Why is this important?

Which of the following vitamins has a Tolerable Upper Intake Level established?

Folate in foods can only be absorbed in the monoglutamate form; therefore, digestive enzymes called _____ are important for folate nutriture.

What amount of supplemental folic acid is recommended daily for women of childbearing age in the United States?

Vitamin B₁₂ is absorbed in the _____.

The normal digestion and absorption of cobalamin requires adequate protein digestion in the stomach; the presence of 2 nonenzymatic proteins: _____; and a receptor located in the _____.

Which of the water-soluble vitamins is found widely distributed in all plant and animal foods, which makes a deficiency unlikely?

Carbon in the one-carbon pool can be in the 5-methyl-THF form or the 5,10-methylene-THF form. Which statement is FALSE?

To absorb folate consumed from green, leafy vegetables, _____.

Ascorbic acid provides a reducing equivalent so that iron is in the _____ form in lysyl hydroxylase.

The necessity of ascorbic acid for its role in _____ is believed to be the reason that people with scurvy have no energy and are very tired.

In the enzyme methionine synthase, vitamin B₁₂ acts by accepting a _____ group from _____ and donating this group to _____ to form methionine.

A good source of vitamin B₆ is muscle meats because PLP is predominantly bound to the enzyme _____.

Tetrahydrofolate is vitally important for dividing cells during growth and cancer and knowledge of this need is used in cancer treatment by giving the drug methotrexate to inhibit the enzyme _____.