Cellular structures which disappear during late prophase and reappear during telophase are-

Options

A. Mitochondria and spindle fibres
B. Plasma membrane
C. Nuclear membrane and nucleolus
D. Plastid

Answer

To answer the question regarding the cellular structures that disappear during late prophase and reappear during telophase, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Prophase**: In the cell cycle, prophase is the first stage of mitosis. During this phase, the chromatin condenses into visible chromosomes, and the nuclear envelope begins to break down.

2. **Identifying Structures that Disappear**: As prophase progresses into late prophase, two key structures disappear:
- The **nuclear membrane** (nuclear envelope) breaks down.
- The **nucleolus** also disappears during this phase.

3. **Understanding Telophase**: Telophase is the final stage of mitosis. During this phase, the chromosomes reach the opposite poles of the cell and begin to de-condense back into chromatin.

4. **Identifying Structures that Reappear**: As the cell transitions into telophase, the following structures reappear:
- The **nuclear membrane** reforms around the separated sets of chromosomes.
- The **nucleolus** reappears within the newly formed nuclei.

5. **Conclusion**: Based on the observations from prophase and telophase, the cellular structures that disappear during late prophase and reappear during telophase are the **nuclear membrane** and the **nucleolus**.

### Final Answer:
The cellular structures which disappear during late prophase and reappear during telophase are the **nuclear membrane and nucleolus**.

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