In respiration of substrate of organic acids, the R.Q. shall be

Options

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

Answer

To solve the question regarding the respiratory quotient (R.Q.) in the respiration of substrates of organic acids, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Respiratory Quotient (R.Q.)**:
- The respiratory quotient 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:
\[ R.Q. = \frac{\text{Volume of CO2 produced}}{\text{Volume of O2 consumed}} \]

2. **Identify the R.Q. Values for Different Substrates**:
- The R.Q. varies depending on the type of substrate being respired:
- For carbohydrates, the R.Q. is approximately 1 (since the amount of CO2 produced equals the amount of O2 consumed).
- For proteins and fats, the R.Q. is less than 1 (indicating that less CO2 is produced compared to O2 consumed).
- For organic acids, the R.Q. is generally greater than 1.

3. **Determine the R.Q. for Organic Acids**:
- Organic acids, when respired, typically yield more CO2 than the O2 consumed. This results in an R.Q. value that is greater than 1.
- Therefore, we can conclude that the R.Q. for organic acids is more than 1.

4. **Select the Correct Option**:
- Based on the understanding that organic acids have an R.Q. greater than 1, we can confidently select this as the correct answer.

### Final Answer:
The respiratory quotient (R.Q.) in the respiration of substrates of organic acids is **more than 1**.

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