Question

Which one of the following is a globular protein?

• A. Insulin
• B. Myosin
• C. Keratin in hair
• D. Keratin in wool

Hint:

Insulin is globular, while keratin and myosin are fibrous proteins.

Answer 1

The Correct Option is A

Step 1: Use solubility as a clue.
Globular proteins dissolve in water. Insulin dissolves and acts as a hormone in blood.

Step 2: Compare.
Keratin forms insoluble structural fibres, and myosin forms muscle fibres.

Final Answer:
Option (A). \[ \boxed{\text{Insulin}} \]