Denaturation of proteins changes its

Options

A. structure and properties
B. structure and not property
C. property but not sturcture
D. neither structure not property.

Answer

### Step-by-Step Solution:

1. **Understanding Denaturation**: Denaturation of proteins refers to the process where proteins lose their native structure due to the disruption of non-covalent interactions (like hydrogen bonds, ionic bonds, and hydrophobic interactions) that maintain their shape.

2. **Factors Affecting Denaturation**: Various factors can lead to denaturation, including temperature, pH, and the presence of certain chemicals. In this case, we will focus on temperature.

3. **Protein Structure**: Proteins have different levels of structure:
- **Primary Structure**: The sequence of amino acids in a polypeptide chain.
- **Secondary Structure**: Local folding into structures like alpha-helices and beta-sheets.
- **Tertiary Structure**: The overall three-dimensional shape of a single polypeptide chain.
- **Quaternary Structure**: The arrangement of multiple polypeptide chains in a protein.

4. **Effect of High Temperature**: When proteins are exposed to high temperatures, the weak interactions that stabilize the secondary and tertiary structures are disrupted. This causes the protein to unfold and revert to a more linear form, resembling its primary structure.

5. **Analyzing the Options**:
- The question asks what changes during denaturation. The options provided are:
- A) Structure and properties
- B) Structure and not property
- C) Properties and not structure
- D) Neither structure nor properties

- **Option A** is incorrect because denaturation changes the structure of the protein but does not necessarily change its properties.
- **Option B** is correct because denaturation changes the structure of the protein while the properties remain largely unchanged.
- **Option C** is incorrect because denaturation does change the structure.
- **Option D** is incorrect because denaturation does change the structure.

6. **Conclusion**: The correct answer is **Option B: Structure and not property**.