Exam 9: Water-Soluble Vitamins

Intrinsic factor is required for the majority of absorption of which vitamin?

Riboflavin is found most often in ____.

Increases in plasma holotranscobalamin TCII concentrations provide an indication of vitamin B₁₂ absorption.

Match the nutrient listed to the phrase or word given.Nutrient choices may be used more than once. -hypochromic,microcytic anemia

A primary function of vitamin C is to act as an ____.

A cobalt deficiency may lead to ____.

Methylation of DNA influences gene expression.Which vitamin is important in this process?

The last vitamin to be discovered was ____.

How do we know that folate fortification has improved the biochemical folate status of Americans?

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

Match the nutrient listed to the phrase or word given.Nutrient choices may be used more than once. -Latin word means "leaf"; Italian word means "foliage"

The primary role of vitamin C is as a reducing agent,particularly for the mineral component of a number of enzymes that becomes oxidized following catalysis of a reaction.

Abnormally high urinary excretion of xanthurenic acid may be an indication of niacin deficiency.

Biotin appears to be a very safe vitamin supplement as there has been no toxicity reported from oral biotin ingestion nor is there a Tolerable Upper Intake Level established.

The degradation of ____ provides the majority of one-carbon groups for pyrimidine synthesis.In this process,____ is formed.

Which of the following reflects long-term folate status?

Which vitamin is most involved in amino acid metabolism?

Although for micronutrients increasing the amount of a protein by directly inducing gene expression is certainly a common mechanism,we have encountered other mechanisms by which vitamins can regulate proteins.Give two examples of how posttranslational modification is involved in this-be as specific as possible.

FMN and FAD act as prosthetic groups for enzymes called ____.

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