NUTR101 Protein

Front

How many essential amino acids must come from the diet because the human body cannot make them?

Back

9

Front

Proteins are made from how many different amino acids?

Back

20

Answer explanation

There are 20 different types of amino acids which can be arranged in different sequences to form proteins.

Front

What element is found in proteins that is not typically found in carbohydrates and lipids?

Back

Nitrogen

Answer explanation

Proteins contain nitrogen, an element not typically found in carbohydrates and lipids.

Front

Which of the following features distinguishes one type of amino acid from another? Amino group, Carboxyl group, Side group, All of the above

Back

Side group

Answer explanation

The distinguishing feature of an amino acid's structure is the side group (R group), as it determines the unique characteristics and properties of each amino acid.

Front

What is the role of hydrochloric acid (HCl) in protein digestion in the stomach?

Back

It activates stomach enzymes and uncoils protein strands.

Answer explanation

Hydrochloric acid (HCl) in the stomach denatures proteins, unraveling their structures, and activates pepsinogen into pepsin, which then breaks down proteins into smaller peptides during digestion.

Front

Which of the following is not a product of protein digestion in the small intestine?
Amino acids,
Tripeptides,
Dipeptides,
Polysaccharides

Back

Polysaccharides

Answer explanation

Polysaccharides are a type of carbohydrate.

Front

What is the final product of protein digestion before absorption?

Back

Amino acids

Answer explanation

Chains of peptides are broken down into single amino acids for absorption.

Front

What is denaturation of protein in the context of stomach digestion?

Back

The process where protein structure is changed, making it easier for enzymes to act on it.

Answer explanation

Denaturation refers to processes that change the structure of a protein.

Front

Which of the following is NOT an example of protein denaturation? Cooking an egg, Curdling milk, Folding a peptide chain into a functional shape, Whipping cream

Back

Folding a peptide chain into a functional shape