One of the following is not produced during the anaerobic respiration in yest. This one is :

Options

A. carbon dioxide
B. energy
C. lactic acid
D. alcohol

Answer

**Step-by-Step Solution:**

1. **Understanding Anaerobic Respiration**: Anaerobic respiration occurs in the absence of oxygen. It is a process used by certain organisms, including yeast, to generate energy.

2. **Identifying Yeast**: Yeast is a unicellular fungus that is commonly used in fermentation processes. It primarily ferments sugars to produce energy.

3. **Products of Yeast Fermentation**: During anaerobic respiration, yeast converts glucose into pyruvate. In the absence of oxygen, pyruvate is then converted into alcohol (ethanol) and carbon dioxide, along with a small amount of energy.

4. **Recognizing Other Anaerobic Processes**: While yeast produces alcohol and carbon dioxide during anaerobic respiration, other organisms, such as human muscle cells, produce lactic acid when oxygen is scarce.

5. **Identifying the Odd One Out**: Among the products of anaerobic respiration, lactic acid is not produced by yeast. Instead, it is produced in human muscles during anaerobic respiration.

6. **Conclusion**: Therefore, the product that is not produced during anaerobic respiration in yeast is **lactic acid**.

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