Take this Quiz: A-Level Biology: Proteins and Enzymes | Zestly

Question 1

Which chemical group is responsible for the unique properties of different amino acids, distinguishing one from another in a polypeptide chain?

Accepted Answer

The R-group (side chain)

Question 2

Which types of bonds or interactions are primarily responsible for maintaining the tertiary structure of a globular protein?

Accepted Answer

Disulfide bridges

Question 3

In the context of enzyme kinetics, how does the induced-fit model differ from the earlier lock-and-key hypothesis?

Accepted Answer

The active site changes shape slightly to accommodate the substrate.

Question 4

What is the primary function of the Biuret test in a laboratory setting?

Answer

To detect the presence of reducing sugars.

Answer

To identify the presence of lipids in a sample.

Answer

To detect the presence of peptide bonds.

Answer

To measure the concentration of free amino acids.

Question 5

Which of the following statements accurately describe the differences between fibrous and globular proteins?

Answer

Fibrous proteins are generally insoluble in water.

Answer

Globular proteins have a primary structure consisting only of repeating sequences.

Answer

Globular proteins are typically spherical and metabolically active.

Answer

Fibrous proteins are primarily involved in catalysis.