In the phases of mitosis, what structures are spindle fibers attached to that help pull the paired chromosomes apart?

• A. Centromeres
• B. Ribosomes
• C. Nucleolus
• D. Cell membrane

Answer: (A)

Verified step by step guidance

1. Understand that mitosis is the process of cell division where a single cell divides to produce two identical daughter cells.
2. Recognize that during mitosis, spindle fibers are crucial for separating the chromosomes into the daughter cells.
3. Identify that spindle fibers attach to specific structures on the chromosomes called centromeres.
4. Recall that centromeres are the part of a chromosome that links sister chromatids, and they serve as the attachment point for spindle fibers.
5. Conclude that the correct structure to which spindle fibers attach during mitosis to pull the paired chromosomes apart is the centromere.