Protein Review

How many different amino acids are universal to humans, and most life on Earth?

• 15

• 20

• 22

• 25

Draw an amino acid

Proteins are comprised of amino acids. Which of the following is NOT a reasonable number of amino acids expected to make a protein?

• 85

• 420

• 1988

• 9000

What is the name of the bond which links amino acids together, forming a polypeptide?

• 1-4 glycosidic linkage

• Ester linkage

• Phosphodiester bond

• Peptide bond

Circle the location of the peptide bond.

What is the name of the reaction shown in the provided image?

Which of the following best describes the primary structure of a protein?

• The linear order of amino acids

• When a protein begins to take a 3D orientation in space

• Hydrogen bonds

• Inclusion of inorganic prosthetic groups

What are the names of two structures which appear in the secondary level of protein folding? Choose all responses which are correct.

• Enzymes

• Alpha helicies

• Disulphide bridges

• Beta pleated sheets

Circle (or draw a line to) an alpha helix in the provided image of insulin.

Match the correct bond with the appropriate level of protein organization.

• Primary : Hydrogen bond

• Secondary : Covalent bond

• Tertiary : Peptide bond

• Tertiary : Disulphide bridges