The R.Q. for anaerobic respiration is

Options

A. 1
B. 0
C. 0.9
D. Infinity

Answer

To solve the question regarding the R.Q. (Respiratory Quotient) for anaerobic respiration, let's break it down step by step.

### Step-by-Step Solution:

1. **Understanding R.Q.**:
- 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:
\[ RQ = \frac{\text{Volume of CO2 evolved}}{\text{Volume of O2 consumed}} \]

2. **Anaerobic Respiration**:
- Anaerobic respiration occurs in the absence of oxygen. This means that during this process, no oxygen is consumed.
- Therefore, the volume of O2 consumed in anaerobic respiration is zero.

3. **Calculating R.Q. for Anaerobic Respiration**:
- If we denote the volume of CO2 evolved during anaerobic respiration as \(X\), we can substitute into the RQ formula:
\[ RQ = \frac{X}{0} \]
- Since division by zero is undefined in mathematics, the RQ for anaerobic respiration approaches infinity.

4. **Conclusion**:
- Based on the above reasoning, the R.Q. for anaerobic respiration is:
\[ \text{Answer: D) Infinity} \]