Topic: Protein  

1. Which amino acid is not considered essential:

A. Histidine B. tryptophan C. proline D. valine

2. The amount of nitrogen excreted regardless of the amount of dietary intake is called:

A. nitrogen balance B. obligatory nitrogen loss C. urea D. nitrogen catabolism

3. An amino acid score is used to:

A. adjust for possible differences in amino acid composition among foods

B. establish the amino acid recommendation

C. establish amino acid recommendations for pregnancy and lactation

D. account for differences in digestibility among amino acids

4. The protein requirement for those over the age of 51 is:

A. greater than that for younger populations

B. the same as that for younger populations

C. lower than that for younger populations

D. There is no requirement for those over 51 years of age.

5. According to the RDA, the 70% adjustment in the protein requirement for lactation represents:

A. an unknown factor

B. an adjustment for statistical error arising from the factorial method

C. an adjustment to correct for the efficiency in the conversion of dietary protein to milk protein

D. the average nitrogen in milk protein

6. The equation of high quality proteins is most likely only accurate in which populations:

A. Adolescence B. early infancy C. adulthood D. all populations

7. It can be argued that __and __are the only true dispensable (non-essential) amino acids because they can be synthesized by mammals via reductive amination of the appropriate keto acid.

A. glutamic acid and serine

B. lysine and theronine

C. glycine and leucine

D. there are no dispensable amino acids

8. Young et al. suggest that the nitrogen balance studies of Rose:

A. may have overestimated basal amino acid needs

B. were highly accurate in estimating basal amino acid needs

C. may have underestimated amino acid needs

D. represented the maximal amount of daily nitrogen needs

9. The transport for di- and tripeptide absorption in the intestinal lumen is:

A. the same as that for signal amino acid

B. a Na+ dependent transport system

C. a passive transport system

D. a Na+/K+ exchange system

10. It is estimated that at least  _of basal energy expenditure is used in maintaining whole-body protein synthesis.

A. 10% B. 20% C. 30% D. 40%