Glucose fermentation by Yeast yields

Options

A. Ethanol `+ CO_(2)`
B. Ethanol `+ H_(2)O`
C. Methanol `+ CO_(2)`
D. `H_(2)O+CO_(2)`

Answer

**Step-by-Step Solution:**

1. **Understanding Fermentation**: Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol in the absence of oxygen. In this case, we are focusing on yeast fermentation of glucose.

2. **Glycolysis**: The first step in the fermentation process is glycolysis. This is a series of reactions that breaks down glucose (a six-carbon sugar) into two molecules of pyruvate (a three-carbon compound). Glycolysis occurs in the cytoplasm of the cell and does not require oxygen.

3. **Formation of Pyruvate**: After glycolysis, glucose is converted into pyruvate. This is the key intermediate that can lead to different metabolic pathways depending on the availability of oxygen.

4. **Anaerobic Pathway in Yeast**: In yeast, when oxygen is not present, pyruvate does not enter the aerobic respiration pathway. Instead, it undergoes fermentation.

5. **Products of Fermentation**: The fermentation process in yeast converts pyruvate into ethanol (alcohol) and carbon dioxide. This is the main biochemical reaction that occurs during the fermentation of glucose by yeast.

6. **Final Answer**: Therefore, the end products of glucose fermentation by yeast are ethanol and carbon dioxide.

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