Pick out the incorrect statement about ATP.

Options

A. It is a nucleotide
B. It contains the purine, adenine
C. The enzyme - catalysed hydrolysis ATP is
ADP and AMP is accompanied by absorption of energy
D. Energy is stored in the cell in form of ATP

Answer

To solve the question of identifying the incorrect statement about ATP (adenosine triphosphate), we will analyze each statement provided in the context of ATP's structure and function.

### Step-by-Step Solution:

1. **Understanding ATP**:
- ATP stands for adenosine triphosphate. It is a nucleotide that plays a crucial role in energy transfer within cells.

2. **Analyzing the Statements**:
- **Statement 1**: "It is a nucleotide."
- This statement is **correct**. ATP is indeed a nucleotide composed of adenine (a purine base), ribose sugar, and three phosphate groups.

- **Statement 2**: "It contains the purine and adenine."
- This statement is **incorrect** as it is misleading. While ATP does contain adenine, which is a purine base, the phrase "the purine" is vague. ATP specifically contains adenine as its purine component, and the statement could be interpreted as suggesting it contains multiple purines, which is not true.

- **Statement 3**: "The enzyme-catalyzed hydrolysis of ATP is ADP and AMP, accompanied by absorption of energy."
- This statement is **incorrect**. The hydrolysis of ATP to ADP (adenosine diphosphate) and AMP (adenosine monophosphate) actually releases energy, not absorbs it. Therefore, this statement is misleading.

- **Statement 4**: "Energy is stored in the cell in the form of ATP."
- This statement is **correct**. ATP is known as the energy currency of the cell, and it is indeed how energy is stored and transferred within cells.

3. **Conclusion**:
- The incorrect statement about ATP is the second one regarding the purine component, as well as the third statement about the hydrolysis process.

### Final Answer:
The incorrect statement about ATP is: "The enzyme-catalyzed hydrolysis of ATP is ADP and AMP, accompanied by absorption of energy."