The enzyme ATP-synthetase is located in …………………….. .

Explanation

**Step-by-Step Text Solution:**

1. **Understanding ATP Synthase**: ATP synthase is an enzyme that plays a crucial role in the production of ATP (adenosine triphosphate), which is the energy currency of the cell.

2. **Identifying the Location**: The enzyme ATP synthase is specifically located in the inner mitochondrial membrane. Mitochondria are double-membraned organelles found in eukaryotic cells.

3. **Role in Electron Transport Chain**: ATP synthase is part of the electron transport chain (ETC), which is a series of complexes that transfer electrons through a membrane, ultimately leading to the production of ATP.

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