Cyclin is associated with which one of the following?

$S$ - Statement: During anaphase,the paired chromatids separate.
$R$ - Reason: During anaphase,the spindle fibers shorten,and the centromere splits.

The equatorial plate (metaphase plate) is observed in which phase of mitosis?

At metaphase,chromosomes are attached to the spindle fibres by their

What are the bipolar spindle fibers made of?

Which of the following events is characteristic of the Prophase stage of mitosis?