Question

Which of the following is a non-fibrous protein present in skin?

• A. Collagen
• B. Reticulin
• C. Keratin
• D. Globulin

Hint:

Fibrous proteins, such as collagen and keratin, provide structural support, while non-fibrous proteins like globulin play key roles in immune function and other biological processes.

Answer 1

The Correct Option is D

Globulin is a non-fibrous protein found in the blood plasma, lymph, and other body tissues. It is crucial in immune functions, such as fighting infections. Unlike fibrous proteins, globulin does not form long, strand-like structures. Instead, it is involved in various physiological processes like immune responses, clotting, and transporting substances. In contrast, collagen, reticulin, and keratin are fibrous proteins. Collagen and reticulin are structural proteins that form part of the extracellular matrix and help in tissue strength and support. Keratin is a structural protein found in skin, hair, and nails, also contributing to protection and structural integrity. Thus, the correct answer is globulin, which is a non-fibrous protein.