Which of the following substrate have maximum RQ value

Options

A. Fat
B. Carbohydrate
C. Prptein
D. oxalic acid

Answer

To determine which substrate has the maximum respiratory quotient (RQ) value, we need to understand the concept of RQ and the values associated with different substrates.

### Step-by-Step Solution:

1. **Understanding RQ**:
- The respiratory quotient (RQ) is defined as the ratio of carbon dioxide (CO2) produced to oxygen (O2) consumed during respiration.
- It provides insight into which substrate is being metabolized for energy.

2. **Identifying RQ Values for Different Substrates**:
- **Fat**: The RQ value for fat is approximately 0.69. This indicates that less CO2 is produced relative to the O2 consumed.
- **Carbohydrate**: The RQ value for carbohydrates is 1. This means that the amount of CO2 produced is equal to the amount of O2 consumed.
- **Protein**: The RQ value for proteins is around 0.8, which is between the values for fat and carbohydrates.
- **Oxalic Acid**: The RQ value for oxalic acid is significantly higher, at 4. This indicates that a large amount of CO2 is produced relative to the O2 consumed.

3. **Comparing RQ Values**:
- Now we compare the RQ values:
- Fat: 0.69
- Carbohydrate: 1
- Protein: 0.8
- Oxalic Acid: 4
- Among these values, oxalic acid has the highest RQ value.

4. **Conclusion**:
- Therefore, the substrate with the maximum RQ value is **oxalic acid**.

### Final Answer:
The substrate with the maximum RQ value is **oxalic acid**.

---