Which one is used for preparation of bread? (A) Lactobacillus (B) Streptobacillus (C) Aspergillus (D) S. cerevisiae

Options

A. Lactobacillus
B. Streptobacillus
C. Aspergillus
D. S. cerevisiae

Answer

To solve the question "Which one is used for preparation of bread?" we will analyze each of the options provided.

### Step 1: Analyze Option A - Lactobacillus
- **Description**: Lactobacillus is a type of lactic acid bacteria.
- **Uses**: It is primarily used in food preservation, the production of yogurt, fermented vegetables, and probiotics.
- **Conclusion**: Not used for bread preparation.

### Step 2: Analyze Option B - Streptobacillus
- **Description**: Streptobacillus is a genus of bacteria.
- **Uses**: It is associated with an infection known as streptobacillus moniliformis, which requires antibiotic treatment.
- **Conclusion**: Not used for bread preparation.

### Step 3: Analyze Option C - Aspergillus
- **Description**: Aspergillus is a genus of fungi.
- **Uses**: A specific strain, Aspergillus niger, is used in the pharmaceutical and food industries for the production of citric acid.
- **Conclusion**: Not used for bread preparation.

### Step 4: Analyze Option D - S. cerevisiae
- **Description**: S. cerevisiae stands for Saccharomyces cerevisiae, which is a type of yeast.
- **Uses**: This yeast is widely used in the baking industry for the production of bread, commonly referred to as baker's yeast.
- **Conclusion**: This is the correct option for bread preparation.

### Final Answer
The correct answer to the question "Which one is used for preparation of bread?" is **(D) S. cerevisiae**.

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