Protoplasm is a

Options

A. Emulsion
B. Complex colloidal solution
C. Molecular solution
D. Suspension

Answer

**Step-by-Step Solution:**

1. **Understanding Protoplasm**: Protoplasm is defined as the living substance within a cell. It includes all the contents of the cell except for the cell wall (in plant cells).

2. **Components of Protoplasm**: Protoplasm is composed of various substances, including:
- Small molecules (ions, amino acids, monosaccharides)
- Water
- Macromolecules (nucleic acids, proteins, lipids)

3. **Nature of Protoplasm**: The components of protoplasm are generally colloidal in nature. This means that they do not dissolve completely but instead form a mixture where small particles are dispersed throughout a medium.

4. **Identifying the Correct Option**: Given the options:
- A. Emulsion
- B. Complex colloidal solution
- C. Molecular solution
- D. Suspension

Since protoplasm contains a mixture of colloidal substances, the most accurate description is that it is a "complex colloidal solution."

5. **Final Answer**: Therefore, the correct answer to the question "Protoplasm is a" is **B. Complex colloidal solution**.

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