Single cell protein can be obtained from

Options

A. bacteria
B. algae
C. fungi
D. all of these

Answer

**Step-by-Step Solution:**

1. **Understanding Single Cell Protein (SCP)**:
- Single Cell Protein refers to the protein extracted from single-celled organisms. These proteins are derived from various microorganisms, including bacteria, algae, and fungi.

2. **Identifying Sources of SCP**:
- Single Cell Protein can be obtained from:
- **Bacteria**: Certain bacteria are rich in protein and can be cultivated for SCP.
- **Algae**: Algae, particularly blue-green algae (cyanobacteria), are also a significant source of SCP.
- **Fungi**: Fungi, including yeast, are commonly used to produce SCP.

3. **Cultivation of SCP**:
- These microorganisms are often cultivated using waste products as substrates. Common substrates include:
- Whey (a byproduct of cheese production)
- Molasses (a byproduct of sugar production)
- Agricultural waste (like straw)

4. **Conclusion**:
- Since Single Cell Protein can be derived from bacteria, algae, and fungi, the correct answer to the question "Single cell protein can be obtained from" is:
- **All of these** (Option D).

**Final Answer**: D) All of these

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