Which structure present on the chromosome serves as the site for the attachment of spindle fibers?

An acrocentric chromosome at metaphase will be:

$P -$ Statement: Small disc-shaped structures called kinetochores are present on the surface of centromeres.
$Q -$ Statement: Spindle fibers attach to the centromeres of chromosomes.

The morphology of the chromosomes is studied during

In which of the following stages does the formation of spindle fibers around the centrosome occur?

The energy required to pull each daughter chromosome towards opposite poles at a rate of $1 \mu m/min$ during anaphase is... (in $, ATP$)