Choose the incorrect Statement from the following.

Options

A. Proteins are made up of polypeptides.
B. Acid insoluble pool contains nucleic acids .
C. Amino acids are ionizable.
D. All proteins are enzymes.

Answer

To solve the question of identifying the incorrect statement from the provided options, we will analyze each statement step by step.

### Step-by-Step Solution:

1. **Statement 1: Proteins are made up of polypeptides.**
- **Analysis:** This statement is correct. Proteins are indeed long chains of amino acids, and these chains are referred to as polypeptides. Multiple polypeptides can come together to form a functional protein.
- **Conclusion:** This statement is correct.

2. **Statement 2: An acid insoluble pool contains nucleic acids.**
- **Analysis:** This statement is also correct. An acid-insoluble pool refers to a collection of macromolecules that do not dissolve in acid. Nucleic acids, such as DNA and RNA, are indeed macromolecules that can be found in this pool, along with proteins and carbohydrates.
- **Conclusion:** This statement is correct.

3. **Statement 3: Amino acids are ionizable.**
- **Analysis:** This statement is correct as well. Amino acids can exist in ionized forms depending on the pH of their environment. Some amino acids have side chains that can also ionize, making them capable of participating in acid-base reactions.
- **Conclusion:** This statement is correct.

4. **Statement 4: All proteins are enzymes.**
- **Analysis:** This statement is incorrect. While all enzymes are proteins, not all proteins function as enzymes. Proteins have various roles in biological systems, including structural, transport, and regulatory functions, in addition to enzymatic activity.
- **Conclusion:** This statement is incorrect.

### Final Conclusion:
The incorrect statement among the given options is **Statement 4: All proteins are enzymes.**