Who proposed crystallo-colloidal nature of protoplasm

Options

A. Fischer
B. Fromann
C. Velton
D. Hanstein

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the individual who proposed the crystallo-colloidal nature of protoplasm.

2. **Identifying Key Terms**: The key terms here are "crystallo-colloidal" and "protoplasm." Protoplasm refers to the living content of a cell, which includes the cytoplasm and the nucleus.

3. **Researching Historical Context**: The concept of the crystallo-colloidal nature of protoplasm was proposed by a scientist.

4. **Identifying the Scientist**: The scientist who proposed this concept is Fischer.

5. **Understanding the Proposal**: Fischer described protoplasm as a translucent living content of the cell that is influenced by the cell membrane. He explained that protoplasm has both crystalline and colloidal properties.

6. **Explaining the Composition**:
- The crystalline nature of protoplasm is attributed to the presence of salts, sugars, acids, and bases.
- The colloidal nature is due to the presence of lipids and proteins.

7. **Conclusion**: Therefore, the answer to the question is that Fischer proposed the crystallo-colloidal nature of protoplasm.

**Final Answer**: Fischer proposed the crystallo-colloidal nature of protoplasm.

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