The Spindle Fibers Attach to the Centromere Via a Protein

Question

The spindle fibers attach to the centromere via a protein complex called
A)tubulins.
B)microtubules.
C)chromatid.
D)kinetochore.
E)chiasma.

Accepted Answer

The protein complex that connects the spindle fibers to the centromere is called the kinetochore. This structure is specifically located at the centromere region of the replicated chromosome and interacts with the spindle fibers to help separate the sister chromatids during cell division. Choices A, B, and C are all related to components of the spindle fibers themselves or the replicated chromosome, but do not specifically refer to the structure that connects them. Choice E, chiasma, refers to the physical crossing-over of genetic material between homologous chromosomes during meiosis and is not related to the interaction between spindle fibers and centromeres during mitosis.