Mark the incorrect statement about `ATP`.

Options

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

Answer

To determine the incorrect statement about ATP (adenosine triphosphate), let's analyze the provided statements one by one.

### Step 1: Identify the nature of ATP
ATP is known as a nucleotide. It consists of three components: adenine (a purine base), ribose (a sugar), and three phosphate groups.

**Hint:** Recall the basic structure of ATP and its components.

### Step 2: Evaluate the first statement
The first statement claims that ATP is a nucleotide. This is true because ATP is indeed classified as a nucleotide due to its structure.

**Hint:** Remember the definition of a nucleotide and its components.

### Step 3: Evaluate the second statement
The second statement mentions that ATP contains the purine adenine. This is also correct, as adenine is one of the key components of ATP.

**Hint:** Consider the types of nitrogenous bases found in nucleotides.

### Step 4: Evaluate the third statement
The third statement asserts that the enzyme catalyzed hydrolysis of ATP to ADP (adenosine diphosphate) and AMP (adenosine monophosphate) is accompanied by the absorption of energy. This statement is incorrect. The hydrolysis of ATP is an exothermic reaction, meaning it releases energy rather than absorbing it.

**Hint:** Think about what happens during the hydrolysis of ATP and whether energy is released or absorbed.

### Step 5: Evaluate the fourth statement
The fourth statement states that energy is stored in cells in the form of ATP. This is a correct statement, as ATP is often referred to as the energy currency of the cell.

**Hint:** Recall the role of ATP in cellular processes and energy storage.

### Conclusion
After evaluating all the statements, we find that the incorrect statement is the third one, which claims that the hydrolysis of ATP is accompanied by the absorption of energy. The correct answer is option C.

**Final Answer:** The incorrect statement about ATP is that the hydrolysis of ATP to ADP and AMP is accompanied by absorption of energy.