Which of the following statement is not correct?

Options

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

Answer

To determine which statement is not correct, let's analyze each of the provided statements step by step:

1. **Statement 1: Insulin maintains sugar level in the blood of a human body.**
- **Analysis:** This statement is correct. Insulin is a hormone produced by the pancreas that helps regulate blood sugar levels. When blood sugar levels rise, insulin is released to lower them by facilitating the uptake of glucose into cells.

2. **Statement 2: O-albumin is a simple food reserve in egg white.**
- **Analysis:** This statement is also correct. O-albumin (or ovalbumin) is a protein found in egg whites and serves as a source of nutrition for the developing embryo. It constitutes a significant portion of the protein content in egg whites and acts as a food reserve.

3. **Statement 3: The blood proteins thrombin and fibrin are involved in blood clotting.**
- **Analysis:** This statement is correct as well. Thrombin is an enzyme that converts fibrinogen into fibrin, which forms a mesh that helps in clotting blood. Both proteins play crucial roles in the coagulation process.

4. **Statement 4: Denaturation makes the protein more active.**
- **Analysis:** This statement is incorrect. Denaturation refers to the process where proteins lose their three-dimensional structure due to external stressors like heat, pH changes, or chemicals. This loss of structure typically results in a loss of function, meaning the protein becomes less active, not more active.

**Conclusion:** The statement that is not correct is **Statement 4: Denaturation makes the protein more active.**