Raw material of respiration is

Options

A. Glucose and fructose
B. Glucose and sucrose
C. `Glucose +O_(2)`
D. `Glucose +CO_(2)`

Answer

To determine the raw material of respiration, we need to analyze the options provided and understand the process of respiration itself.

### Step-by-Step Solution:

1. **Understanding Respiration**: Respiration is a biochemical process that involves the breakdown of macromolecules to release energy. This can occur in the presence of oxygen (aerobic respiration) or in its absence (anaerobic respiration).

2. **Identifying the Raw Materials**: The primary raw material for the process of respiration is glucose. Glucose is a simple sugar that is commonly used by cells to produce energy.

3. **Analyzing the Options**:
- **Option 1: Glucose and Fructose**: While fructose can also be used in respiration, it is not the primary raw material. Therefore, this option is not correct.
- **Option 2: Glucose and Sucrose**: Sucrose is a disaccharide made of glucose and fructose. It is not the direct raw material for respiration. Hence, this option is also incorrect.
- **Option 3: Glucose and Oxygen**: In aerobic respiration, glucose is indeed used along with oxygen to produce energy. However, during the initial stages of glycolysis, oxygen is not required. Thus, while glucose is a raw material, oxygen is not used in the glycolysis stage.
- **Option 4: Glucose and Carbon Dioxide**: Carbon dioxide is a byproduct of respiration, not a raw material. Therefore, this option is incorrect.

4. **Conclusion**: The correct answer is that the raw material of respiration is glucose. While oxygen is essential for aerobic respiration, it is not a raw material in the glycolysis phase where glucose is primarily utilized.

### Final Answer:
The raw material of respiration is **glucose**.