Proteins are made up of amino acids linked by peptide bonds.

Collagen is a fibrous protein that provides structural support in connective tissues.

Denaturation of a protein affects its function but does not change its structure.

Which of the following is NOT a function of proteins?

• Enzymatic activity
• Genetic information storage
• Structural support
• Transport of molecules

The primary structure of a protein is determined by:

• Hydrogen bonding
• The number of α-helices
• The sequence of amino acids
• The interaction between subunits

Which amino acid contains a sulfur atom and can form disulfide bonds?

• Glycine
• Proline
• Serine
• Cysteine

Which level of protein structure is responsible for α-helices and β-sheets?

• Primary
• Secondary
• Tertiary
• Quartenary

Globular proteins are generally water-soluble.

Name one factor that can denature a protein.

• Heat

• pH

• Organic solvents

• Temperature

• Heavy metals

The monomers of proteins are called ________.

• Amino acid

The structural protein found in hair and nails is called ________.

• Keratin

The bond that forms between two cysteine residues in a protein is called a ________ bond.

• Disulfide

The enzyme that catalyzes the breakdown of proteins into peptides is called ________.

• Protease

• Peptidase