Which substance undergoes oxidation during cellular respiration?

Options

A. Oxygen
B. Carbaminohaemoglobin
C. Glucose
D. Bicarbonate ions

Explanation

**Step-by-Step Solution:**

1. **Understanding Cellular Respiration**: Cellular respiration is a biochemical process that occurs in living organisms to convert glucose into energy. This process can occur in the presence of oxygen (aerobic respiration) or in the absence of oxygen (anaerobic respiration).

2. **Identifying the Process**: In aerobic respiration, glucose is the primary substance that undergoes oxidation. This means that glucose is broken down, and in the process, it loses electrons.

3. **Chemical Reaction**: The overall chemical equation for aerobic respiration can be represented as:
\[ \text{C}_6\text{H}_{12}\text{O}_6 + 6\text{O}_2 \rightarrow 6\text{CO}_2 + 6\text{H}_2\text{O} + \text{Energy (ATP)} \]
Here, glucose (C₆H₁₂O₆) reacts with oxygen (O₂) to produce carbon dioxide (CO₂), water (H₂O), and energy in the form of ATP.

4. **Conclusion**: From the above information, it is clear that during cellular respiration, glucose is the substance that undergoes oxidation. Therefore, the correct answer to the question is **glucose**.

**Final Answer**: Glucose undergoes oxidation during cellular respiration.

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