What is an example of globular protein?

(A) Insulin
(B) Keratin
(C) Albumin
(D) Myosin

Choose the correct answer from the options given below:

(A) and (C) only

The correct answer is Option (2) → (A) and (C) only

Proteins are classified into two main structural types based on their molecular shape: Globular and Fibrous.

1. Globular Proteins

Globular proteins are formed when the chains of polypeptides coil around to give a spherical (globe-like) shape. They are usually soluble in water.

• (A) Insulin: A hormone that regulates blood sugar. It is a classic example of a globular protein.
• (C) Albumin: Found in egg whites and blood plasma. It is highly soluble in water and is a globular protein.

2. Fibrous Proteins

Fibrous proteins consist of linear, thread-like molecules that lie side by side to form fibers. They are insoluble in water.

• (B) Keratin: Found in hair, wool, and silk. It is a fibrous protein.
• (D) Myosin: Found in muscles. It is also a fibrous protein.