Microfilaments are involed in

Options

A. Cyclosis
B. Amoeboid movement
C. Furrow formation during cell division
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Microfilaments**: Microfilaments are structural components of the cytoskeleton in eukaryotic cells. They are primarily composed of actin, a protein that forms two strands twisted around each other, giving them a diameter of about 7 nanometers.

2. **Functions of Microfilaments**: Microfilaments play several crucial roles in cellular processes:
- **Cytokinesis**: This is the process where the cytoplasm of a parental cell is divided into two daughter cells during cell division.
- **Amoeboid Movement**: This refers to the movement of cells, like amoebas, which can change shape and move by extending and retracting their cytoplasm.
- **Cell Shape Changes**: Microfilaments are involved in maintaining and altering the shape of the cell.
- **Cell Contractility**: They also facilitate contraction in muscle cells and other types of cells.

3. **Analyzing the Options**:
- **Option A: Cyclosis**: This refers to the movement of the cytoplasm within a cell. Microfilaments are not primarily responsible for this process.
- **Option B: Amoeboid Movement**: Microfilaments are indeed involved in this type of movement, as they allow the cell to change shape and move.
- **Option C: Furrow Formation During Cell Division**: While microfilaments do play a role in cytokinesis, the specific term "furrow formation" is more closely associated with the role of microtubules and the contractile ring formed by microfilaments.
- **Option D: All of These**: Since not all the options are correct, this cannot be the answer.

4. **Conclusion**: Based on the analysis, the correct answer is **Option B: Amoeboid Movement**.