R.Q. is infinity. Respiration is

Options

A. Aerobic, carbohydrate
B. Aerobic, fat
C. Aerobic, protein
D. Anaerobic, carbohydrate.

Answer

To solve the question "R.Q. is infinity. Respiration is?", we need to understand the concept of Respiratory Quotient (RQ) and the conditions under which it becomes infinite.

### 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, RQ = CO2 eliminated / O2 consumed.

2. **Condition for RQ to be Infinity**:
- RQ becomes infinite when the volume of oxygen consumed is zero. This means that there is no oxygen available for the respiration process.
- In this case, even if carbon dioxide is produced, since O2 consumption is zero, the RQ value will be undefined or considered infinite.

3. **Type of Respiration**:
- When oxygen is not available, organisms rely on anaerobic respiration. This type of respiration occurs in the absence of oxygen.
- During anaerobic respiration, carbohydrates (like glucose) can be broken down to produce energy, resulting in the production of carbon dioxide and other byproducts.

4. **Conclusion**:
- Since RQ is infinite when there is no oxygen consumption, the type of respiration occurring under these conditions is anaerobic respiration, particularly involving carbohydrates.
- Therefore, the correct answer to the question is: **Anaerobic carbohydrate**.

### Final Answer:
**The respiration is anaerobic carbohydrate.**

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