Question

Mark the wrong statement about the denaturation of proteins.

• A. Globular proteins are converted into fibrous proteins.
• B. The biological activity of the proteins changes.
• C. The primary structure of the protein does not change.
• D. Fibrous proteins are converted into globular proteins.

Answer 1

The correct option is D

Fibrous proteins are converted into globular proteins.

The correct option is D.

Explanation for the correct option:

1. During denaturation of proteins, fibrous proteins are not converted into globular proteins.
2. Due to denaturation, globules unfold and helix gets uncoiled and protein loses its biological activity.
3. Thus, globular proteins are converted into fibrous proteins.

Explanation for the incorrect options:

Option A:

1. Globular proteins are spherical in shape, but when these are denatured, they get converted into fibrous proteins.

Option B:

1. In denaturation, the primary structure stays intact and demonstrates the amino acid arrangement.
2. The secondary and tertiary structure changes, which entails the biological activity of proteins, hence this statement is correct.

Option C:

1. There is denaturation of proteins by changing either temperature or pH, the primary structure stays intact while the secondary and tertiary structure is destroyed.

Final answer: The wrong statement about the denaturation of proteins is fibrous proteins are converted into globular proteins.