NEET 2023 Phase 2 · ChemistryProtein structurePrevious Year Question
Which of the following statements is not correct?
Answer: (D) Denaturation makes the proteins more active. \textbf{Answer:} (D) Denaturation destroys, not enhances, protein activity.
- A.Insulin maintains sugar level in the blood of a human body
- B.Ovalbumin is a simple food reserve in egg-white
- C.Blood proteins thrombin and fibrinogen are involved in blood clotting
- D.Denaturation makes the proteins more active✓
Correct Answer
(D) Denaturation makes the proteins more active
Solution & Explanation
\textbf{Answer:} (D) Denaturation destroys, not enhances, protein activity. \textbf{Solution:} On denaturation the secondary and tertiary structure of a protein unfolds (the helices uncoil and the globular shape is lost), so the protein loses its biological activity rather than becoming more active — statement D is incorrect. The remaining statements are correct: insulin regulates blood sugar, ovalbumin is the storage protein of egg-white, and thrombin and fibrinogen are blood proteins involved in clotting.
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