Products of anaerobic respiration are

Options

A. Ethyl alcohol and carbon monoxide
B. Ethyl alcohol and lactic acid
C. Lactic acid and glycogen
D. Acetic acid and carbon dioxide.

Answer

### Step-by-Step Solution:

1. **Understanding Anaerobic Respiration**:
- Anaerobic respiration occurs in the absence of oxygen. It is a type of respiration that allows organisms to convert glucose into energy without using oxygen.

2. **Identifying the Products of Anaerobic Respiration**:
- Anaerobic respiration can lead to two main types of fermentation:
- **Alcohol Fermentation**: In this process, glucose is converted into ethanol (ethyl alcohol) and carbon dioxide. This type of fermentation is commonly seen in yeast and some bacteria.
- **Lactic Acid Fermentation**: In this process, glucose is converted into lactic acid. This occurs in certain bacteria and in muscle cells of animals when oxygen is scarce.

3. **Analyzing the Options**:
- The question provides four options regarding the products of anaerobic respiration:
1. Ethyl alcohol and carbon monoxide
2. Ethyl alcohol and lactic acid
3. Lactic acid and glycogen
4. Acetic acid and carbon dioxide

4. **Evaluating Each Option**:
- **Option 1**: Ethyl alcohol and carbon monoxide - Incorrect. Ethyl alcohol (ethanol) is produced, but carbon monoxide is not; instead, carbon dioxide is produced.
- **Option 2**: Ethyl alcohol and lactic acid - Correct. Ethyl alcohol (from alcohol fermentation) and lactic acid (from lactic acid fermentation) are both products of anaerobic respiration.
- **Option 3**: Lactic acid and glycogen - Incorrect. Glycogen is not a product of anaerobic respiration; it is a storage form of glucose.
- **Option 4**: Acetic acid and carbon dioxide - Incorrect. Acetic acid is not produced during anaerobic respiration; carbon dioxide is produced, but not acetic acid.

5. **Conclusion**:
- The correct answer is **Option 2: Ethyl alcohol and lactic acid**.