What structural change marks the process of cytokinesis in animal cells?
Solution
Correct Answer: Option A
- The process of cytokinesis in animal cells is marked by the formation of a cleavage furrow, which is a key structural change.
- During the final stages of cell division, the cell membrane begins to constrict at the metaphase plate, creating an indentation known as the cleavage furrow.
- This furrow deepens as a contractile ring composed of actin and myosin filaments tightens, eventually leading to the physical separation of the two daughter cells.
- In contrast, plant cells undergo cytokinesis by developing a cell plate due to the presence of a rigid cell wall, which prevents furrowing.
- The other options, such as condensation of chromatin and disintegration of the nuclear envelope, are events associated with earlier phases of mitosis and not specific to cytokinesis itself.
To summarize:
- Cleavage furrow formation is specific to animal cells during cytokinesis.
- The furrow results from a contractile ring that pinches the cell membrane.
- This process ultimately leads to the separation of two genetically identical daughter cells.
- During the final stages of cell division, the cell membrane begins to constrict at the metaphase plate, creating an indentation known as the cleavage furrow.
- This furrow deepens as a contractile ring composed of actin and myosin filaments tightens, eventually leading to the physical separation of the two daughter cells.
- In contrast, plant cells undergo cytokinesis by developing a cell plate due to the presence of a rigid cell wall, which prevents furrowing.
- The other options, such as condensation of chromatin and disintegration of the nuclear envelope, are events associated with earlier phases of mitosis and not specific to cytokinesis itself.
To summarize:
- Cleavage furrow formation is specific to animal cells during cytokinesis.
- The furrow results from a contractile ring that pinches the cell membrane.
- This process ultimately leads to the separation of two genetically identical daughter cells.
Practice More Questions on Our App!
Download our app for free and access thousands of MCQ questions with detailed solutions