MULTIPLE CHOICE

1.Of the following elements associated with macronutrients, which is found exclusively in proteins?

a.carbon

b.oxygen

c.hydrogen

d.nitrogen

2.Which of the following elements found in proteins makes them unique compared to the composition of carbohydrates and fats?

a.carbon

b.oxygen

c.nitrogen

d.hydrogen

3.How many different kinds of amino acids make up proteins?

a.8

b.10

c.14

d.20

4.Which of the following terms that are used to classify amino acids in the diet apply to alanine?

a.essential

b.nonessential

c.indispensable

d.conditionally essential

5.Which of the following groups are all contained in an amino acid?

a.an amino group, an acid group, an aldehyde group

b.an amino group, an alcohol group, a sulfur group

c.an amino group, an acid group, a side group

d.an amino group, and aldehyde group, an aromatic group

6.Which of the following is the approximate number of different amino acids used in the synthesis of body proteins?

a.5

b.10

c.15

d.20

7.What is the simplest amino acid?

a.valine

b.glycine

c.alanine

d.methionine

8.Which of the following is a dispensable amino acid in human nutrition?

a.proline

b.threonine

c.methionine

d.tryptophan

9.Where does the body obtain indispensable amino acids?

a.diet only

b.diet or synthesis from other amino acids

c.diet or synthesis from other amino acids or carbohydrate fragments

d.diet or synthesis from  other amino acids, carbohydrate fragments or fragments of fat

10.What type of reaction is required to bind 2 molecules of glycine together and release a molecule of water?

a.hydrolysis

b.deamination

c.denaturation

d.condensation