Proteins 6

Which of the following element is found in proteins but not in carbohydrates and fats?

• Carbon

• Oxygen

• Nitrogen

• Calcium

Which of the following is what distinguishes each amino acid from another?

• The central carbon atom

• The number of oxygen atoms

• The side group

• The number of nitrogen atoms

Terms used to classify amino acids in the diet include all of the following, except:

• Partially essential

• non-essential
• essential
• non-proteinogenic

How many different kinds of amino acids make up proteins?

• 8

• 20

• 10

• 14

All of the following are contained in an amino acid, except:

• an acid group

• an aldehyde group

Which of the following is the simplest amino acid?

• Glycine

• Methionine

• Alanine

• Valine

Any of the following can be used by the body for the synthesis of a non-essential amino acid, except:

• an essential mineral

• a fragment of fat

• an essential amino acid

Which amino acid is classified as conditionally essential when the dietary intake of phenylalanine is insufficient or the body cannot normally metabolise phenylalanine?

• Cysteine

• Glutamine

• Isoleucine

• Tyrosine

Which of the following statements describes a feature of an essential amino acid?

• It is unnecessary in the diet

• It must be supplied by the diet

• It can be made from fat in the body

• It can be made from glucose in the body

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

• Condensation

• Deamination

• Denaturation

• Hydrolysis