Anaerobic products of fermentation are

Options

A. protein and acetic acid
B. alcohol or lactic acid
C. ethers and acetones
D. alcohol and lipoproteins

Explanation

**Step-by-Step Text Solution:**

1. **Understanding Fermentation**: Fermentation is an anaerobic process that occurs when oxygen is not available. It is a way for cells to produce energy from glucose.

2. **Glycolysis**: The first step in the breakdown of glucose is glycolysis, where one molecule of glucose is converted into two molecules of pyruvic acid (or pyruvate).

3. **Anaerobic Conditions**: In the absence of oxygen, pyruvate does not enter the aerobic respiration pathway. Instead, it undergoes fermentation.

4. **Types of Fermentation**: There are two main types of fermentation:
- **Alcoholic Fermentation**: This occurs in yeast and some bacteria. Here, pyruvate is converted into ethyl alcohol (ethanol) and carbon dioxide.
- **Lactic Acid Fermentation**: This occurs in human muscles during intense exercise when oxygen is scarce. In this process, pyruvate is converted into lactic acid.

5. **End Products**: The end products of fermentation are:
- **Alcoholic Fermentation**: Ethyl alcohol (ethanol) and carbon dioxide.
- **Lactic Acid Fermentation**: Lactic acid.

6. **Conclusion**: Therefore, the anaerobic products of fermentation are ethyl alcohol (from alcoholic fermentation) and lactic acid (from lactic acid fermentation).

7. **Correct Option**: Based on the above analysis, the correct answer to the question is that the anaerobic products of fermentation are ethyl alcohol and lactic acid.

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