Question

What is an example of globular protein? (A) Insulin
(B) Keratin
(C) Albumin
(D) Myosin

• A. (A), (B) and (D) only
• B. (A) and (C) only
• C. (A), (B), (C) and (D)
• D. (B), (C) and (D) only

Hint:

Globular proteins have a spherical shape and are water-soluble, making them functional in various biochemical processes such as catalysis and immune defense.

Answer 1

The Correct Option is B

Step 1: Understanding globular proteins.
Globular proteins are typically water-soluble and have a spherical shape. They play various functional roles such as enzymatic activity, immune responses, and transport.
Step 2: Analyzing the options.
- (A) Insulin: Insulin is a globular protein, playing a crucial role in regulating blood sugar levels.
- (B) Keratin: Keratin is a fibrous protein, not globular. It is involved in the structure of hair, nails, and skin.
- (C) Albumin: Albumin is a globular protein found in blood plasma, responsible for maintaining osmotic pressure.
- (D) Myosin: Myosin is a fibrous protein, not globular. It is involved in muscle contraction.
Step 3: Conclusion.
The correct examples of globular proteins are Insulin and Albumin, making option (2) correct.
Final Answer: \[ \boxed{\text{The correct answer is (A) and (C) only.}} \]