Name the molecule acting as biological energy currency in organisms.

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the name of a molecule that functions as the biological energy currency in organisms. This implies that we are looking for a molecule that stores and provides energy for various biological processes.

2. **Identifying the Molecule**: The molecule that is widely recognized as the biological energy currency is ATP, which stands for adenosine triphosphate.

3. **Explaining ATP**: ATP consists of an adenosine molecule bonded to three phosphate groups. The bonds between these phosphate groups are high-energy bonds. When these bonds are broken (for example, when ATP is converted to ADP - adenosine diphosphate), energy is released.

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