If respiratory substrate has high proportion of oxygen as campared to carbon and hydrogen, RQ will be

Options

A. Less than one
B. More than one
C. Infinity
D. Zero

Answer

To determine the respiratory quotient (RQ) when the respiratory substrate has a high proportion of oxygen compared to carbon and hydrogen, we can follow these steps:

### Step-by-Step Solution

1. **Understanding RQ**: The respiratory quotient (RQ) is defined as the ratio of the volume of carbon dioxide (CO2) produced to the volume of oxygen (O2) consumed during respiration. Mathematically, it is expressed as:
\[ RQ = \frac{\text{Volume of CO2 produced}}{\text{Volume of O2 consumed}} \]

2. **Identifying Respiratory Substrates**: Respiratory substrates are the organic compounds that are broken down during respiration to release energy. Common substrates include carbohydrates, fats, and proteins.

3. **Analyzing the Composition of the Substrate**: In this case, the substrate has a high proportion of oxygen relative to carbon and hydrogen. This means that during the breakdown of this substrate, more oxygen is utilized compared to the amount of carbon dioxide produced.

4. **Understanding RQ Values for Different Substrates**:
- For carbohydrates, RQ is approximately 1.
- For fats, RQ is about 0.7.
- For proteins, RQ is around 0.8.
- For organic acids, RQ is greater than 1 due to a higher oxygen content.

5. **Conclusion**: Since the substrate in question has a high proportion of oxygen, it indicates that the breakdown of this substrate will result in a higher volume of oxygen being consumed relative to the volume of carbon dioxide produced. Therefore, the RQ value will be greater than 1.

### Final Answer
If the respiratory substrate has a high proportion of oxygen compared to carbon and hydrogen, the RQ will be greater than 1.

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