The mitotic spindle is composed of-

Options

A. Chromosomes
B. Chromatids
C. Microtubules
D. Chromatin

Answer

**Step-by-Step Solution:**

1. **Understanding the Mitotic Spindle:**
- The mitotic spindle is a structure that is essential for cell division, particularly during mitosis. It helps in the separation of chromosomes into the daughter cells.

2. **Components of the Mitotic Spindle:**
- The mitotic spindle is primarily composed of spindle fibers. These fibers play a crucial role in attaching to chromosomes and facilitating their movement.

3. **Role of Kinetochore:**
- Each chromosome has a region called the centromere, where a protein structure known as the kinetochore forms. The kinetochore serves as the attachment point for spindle fibers.

4. **Composition of Spindle Fibers:**
- The spindle fibers are made up of microtubules, which are cylindrical structures composed of tubulin protein subunits. These microtubules are dynamic and can grow or shrink as needed during cell division.

5. **Conclusion:**
- Therefore, the mitotic spindle is composed of microtubules.

**Final Answer:**
The mitotic spindle is composed of microtubules.

---