Which of these parts of a cell is called the protoplasm ?

Options

A. Cytoplasm and nucleolus
B. Cytoplasm and nucleus
C. Nucleoplasm and cucleolus
D. Nuclear membrane and nucleoplasm

Answer

To answer the question "Which of these parts of a cell is called the protoplasm?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Protoplasm**: Protoplasm is the living substance within a cell. It is composed of two main components: the cytoplasm and the nucleus.

2. **Analyze the Options**:
- Option A: Cytoplasm and Nucleolus
- Option B: Cytoplasm and Nucleus
- Option C: Nucleoplasm and Nucleolus
- Option D: Nuclear Membrane and Nucleoplasm

3. **Identify the Correct Components**:
- The protoplasm includes the cytoplasm (the gel-like substance within the cell membrane) and the nucleus (the control center of the cell that contains genetic material).

4. **Select the Correct Answer**: Based on the definition, the correct answer is **Option B: Cytoplasm and Nucleus**.

5. **Conclusion**: Protoplasm is defined as the combination of cytoplasm and nucleus, which are essential for the living processes of the cell.

### Final Answer:
The part of the cell called protoplasm is **Cytoplasm and Nucleus** (Option B).

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