In which stage of cell division are chromosomes most condensed?

The splitting of the centromere occurs in .......... .

The best stage to count the number of chromosomes during mitosis is or the structure of chromosomes can be best seen at:

Choose the correct combination of options to select the correct statement for prophase:
$I.$ Chromosomal material condenses to form compact mitotic chromosomes.
$II.$ The assembly of mitotic spindle is initiated by the microtubules.
$III.$ Cells do not show organelles when viewed under the prophase.
$IV.$ The nucleolus or nucleoli degenerate completely.

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

What is a kinetochore?