Which is the raw material in cell respiration.

Answer

### Step-by-Step Solution:

1. **Understanding Cellular Respiration**: Cellular respiration is a biochemical process in which cells convert glucose and oxygen into energy. This process is essential for the survival of cells as it provides the energy necessary for various cellular functions.

2. **Identifying Raw Materials**: The primary raw materials required for cellular respiration are:
- **Glucose**: A simple sugar that serves as the main energy source for cells.
- **Oxygen**: A gas that is essential for the aerobic respiration process.

3. **Role of Glucose**: During cellular respiration, glucose is broken down through various biochemical pathways to release energy. This energy is then stored in the form of ATP (adenosine triphosphate), which is the energy currency of the cell.

4. **Role of Oxygen**: Oxygen is used in the later stages of cellular respiration, specifically in the electron transport chain, where it acts as the final electron acceptor. This is crucial for the efficient production of ATP.

5. **Conclusion**: Therefore, the raw materials for cellular respiration are **glucose and oxygen**.