Select the INCORRECTLY matched pair.

Options

A. End products of alcoholic fermentation - Ethanol `+CO_2`
B. End products of lactic acid fermentation - Lactic acid + `CO_2`
C. RQ of lipids - Less than one
D. RQ of carbohydrates - One

Answer

To solve the question of selecting the INCORRECTLY matched pair, we will analyze each option one by one.

### Step-by-Step Solution:

1. **Option A: End products of alcoholic fermentation is ethanol.**
- Alcoholic fermentation primarily occurs in yeast and produces ethanol and carbon dioxide as end products. This statement is correct.

2. **Option B: End products of lactic acid fermentation, lactic acid plus CO2.**
- Lactic acid fermentation occurs in certain bacteria and muscle cells. The primary end product is lactic acid, and it does not produce carbon dioxide (CO2) as a byproduct. Therefore, this statement is incorrect because it suggests that CO2 is produced alongside lactic acid.

3. **Option C: RQ of lipids less than 1.**
- The respiratory quotient (RQ) is the ratio of carbon dioxide produced to oxygen consumed. For lipids, the RQ is indeed less than 1, typically around 0.7. This statement is correct.

4. **Option D: RQ of carbohydrates is 1.**
- The RQ for carbohydrates is generally 1 because the amount of carbon dioxide produced is equal to the amount of oxygen consumed during the complete oxidation of glucose. This statement is correct.

### Conclusion:
After analyzing all the options, we find that **Option B** is the incorrectly matched pair. The correct end product of lactic acid fermentation is lactic acid alone, not lactic acid plus CO2.

### Final Answer:
**Option B: End products of lactic acid fermentation, lactic acid plus CO2.**

---