Oxygen taken in during respiration is used to break down _______ produced as a result of photosynthesis.

Options

A. glucose
B. protein
C. fats
D. vitamin

Answer

**Step-by-Step Solution:**

1. **Understanding Respiration in Plants and Animals**: Respiration is a process that occurs in both plants and animals where oxygen is used to break down substances to release energy.

2. **Role of Oxygen in Respiration**: During respiration, oxygen is taken in and is essential for breaking down certain compounds that are produced during photosynthesis.

3. **Identifying the Substance Produced in Photosynthesis**: The primary product of photosynthesis is glucose. Plants convert sunlight, carbon dioxide, and water into glucose and oxygen.

4. **Breaking Down Glucose**: In respiration, glucose is broken down using oxygen to release energy. This process produces carbon dioxide and water as byproducts.

5. **Conclusion**: Therefore, the oxygen taken in during respiration is used to break down glucose, which is produced as a result of photosynthesis.

**Final Answer**: Oxygen taken in during respiration is used to break down **glucose** produced as a result of photosynthesis.

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