Choose the correct statements with respect to the completion of prophase
I. Chromosomal material condenses to from compact mitotic chromosomes. Chromosomes are seen to be composed of two chromatids attached together at the centromere.
II. Initiation of the assembly of mitotic spindle, the microtubules, the proteinaceous components of the cell cytoplasm
III. Cells at the end of prophase, when viewed under the microscope, do not show golgi complexes, endoplasmic reticulum, nucleolus and the nuclear envelope

Options

A. I only
B. II only
C. I and II
D. I, II and III

Answer

To solve the question regarding the completion of prophase, we will analyze each statement provided and determine their correctness based on our knowledge of cell division.

### Step-by-Step Solution:

1. **Analyze Statement I**:
- "Chromosomal material condenses to form compact mitotic chromosomes. Chromosomes are seen to be composed of two chromatids attached together at the centromere."
- **Evaluation**: This statement is correct. During prophase, chromatin condenses into visible chromosomes, each consisting of two sister chromatids joined at the centromere.

2. **Analyze Statement II**:
- "Initiation of the assembly of mitotic spindle, the microtubules, the proteinaceous components of the cell cytoplasm."
- **Evaluation**: This statement is also correct. Prophase marks the beginning of the formation of the mitotic spindle, which is made up of microtubules and other proteins that help in the separation of chromosomes.

3. **Analyze Statement III**:
- "Cells at the end of prophase, when viewed under the microscope, do not show Golgi complexes, endoplasmic reticulum, nucleolus and the nuclear envelope."
- **Evaluation**: This statement is correct as well. During prophase, the Golgi apparatus, endoplasmic reticulum, nucleolus, and nuclear envelope disassemble, making them not visible under the microscope.

4. **Conclusion**:
- Since all three statements (I, II, and III) are correct, the correct answer is option 4: "1st, 2nd, and 3rd."

### Final Answer:
The correct statements with respect to the completion of prophase are all three statements: I, II, and III. Therefore, the answer is option 4.

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