Potential energy stored in organic molecules in converted into chemical energy in high energy phosphate bonds of ATP.

Explanation

### Step-by-Step Solution:

1. **Understanding Potential Energy in Organic Molecules**:
- Organic molecules, such as carbohydrates, fats, and proteins, contain potential energy due to the chemical bonds between their atoms. This energy can be released during metabolic processes.

**Hint**: Think about how food provides energy for living organisms.

2. **Conversion of Potential Energy to Chemical Energy**:
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