Select an incorrect statement

Options

A. DNA is the predominant genetic material
B. RNA performs dynamic functions of messenger and adapter
C. Stability of genetic material was very evident in Griffith's 'transforming principle' itself that heat, which killed the bacteria, at least did not destroy some of the properties of genetic material.
D. RNA is known to be catalytic and unreactive

Answer

To solve the question of selecting an incorrect statement, we will analyze each statement provided:

1. **Statement 1**: "DNA is the predominant genetic material."
- This statement is correct. DNA is indeed the primary genetic material in most organisms.

2. **Statement 2**: "RNA is found only in some viruses. While DNA is found in every organism."
- This statement is also correct. RNA is primarily found in viruses, while DNA is the genetic material in all living organisms.

3. **Statement 3**: "Stability of genetic material was very evident in Griffith's Transforming Principle."
- This statement is correct. Griffith's experiment demonstrated that DNA could transfer genetic information, showing the stability of genetic material.

4. **Statement 4**: "RNA is known to be catalytic and unreactive."
- This statement is incorrect. While RNA can have catalytic functions (as seen in ribozymes), it is not unreactive; in fact, RNA is known to be quite reactive.

Based on the analysis, the incorrect statement is **Statement 4**.

### Step-by-Step Solution:
1. **Identify the statements**: Read through all the statements provided in the question.
2. **Evaluate each statement**: Determine whether each statement is correct or incorrect based on biological principles.
3. **Select the incorrect statement**: After evaluating all statements, identify which one is incorrect.
4. **Conclude**: State that the fourth statement is the incorrect one.