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: Defining Globular Proteins.
Globular proteins are characteristically water-soluble and possess a spherical conformation. Their functions are diverse, encompassing enzymatic catalysis, immune responses, and molecular transport.
Step 2: Evaluating Provided Choices.
- (A) Insulin: A globular protein critical for blood glucose regulation.
- (B) Keratin: A fibrous protein, thus not globular. It provides structural integrity to hair, nails, and skin.
- (C) Albumin: A globular protein present in blood plasma, essential for maintaining osmotic pressure.
- (D) Myosin: A fibrous protein, not globular. It is a key component in muscle contraction.
Step 3: Determining the Correct Examples.
Insulin and Albumin are identified as globular proteins, supporting the correctness of option (2).
Final Answer: \[\boxed{\text{The correct answer is (A) and (C) only.}}\]