During fermentation by Yeast, alcohol is formed from

Options

A. Proteins
B. Sugars
C. Mucopolysaccharides
D. Fats

Answer

**Step-by-Step Solution:**

1. **Identify the Process**: The question is about the process of fermentation by yeast, specifically focusing on what substance is converted into alcohol.

2. **Understand the Role of Yeast**: Yeast, particularly the strain Saccharomyces cerevisiae, is known for its role in alcoholic fermentation. This organism is a type of fungus that can convert sugars into alcohol and carbon dioxide.

3. **Identify the Reactants**: In the fermentation process, yeast primarily utilizes sugars. The most common sugar involved in this process is glucose.

4. **Chemical Reaction**: The chemical reaction for alcoholic fermentation can be summarized as follows:
- Glucose (C6H12O6) is converted into ethanol (C2H5OH) and carbon dioxide (CO2).
- The balanced reaction can be represented as:
\[ C6H12O6 \rightarrow 2 C2H5OH + 2 CO2 \]
This indicates that one molecule of glucose produces two molecules of ethanol and two molecules of carbon dioxide.

5. **Evaluate the Options**: The question provides several options:
- a) Protein
- b) Sugar
- c) Mucopolysaccharides
- d) Fats
Based on our understanding, the correct answer is **b) Sugar**, as it is the reactant that yeast ferments to produce alcohol.

6. **Conclusion**: Therefore, during fermentation by yeast, alcohol is formed from sugars.

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