Between two successive mitotic divisions,a cell is said to be in the:

In animal cells,during the $S$-phase,$DNA$ replication begins in the nucleus and the centrioles duplicate in the ..........

In which phase does $DNA$ replication occur?

In which of the following cells is the cell cycle completed in $90$ minutes?

Which of the following statements are correct for $G_{1}$-phase?
$I.$ It is the last substage of interphase
$II.$ Cell organelles do not increase in number
$III.$ Cell grows in size and content both
$IV.$ It synthesizes $RNAs$,proteins and other biochemicals for cell growth and subsequent replication of $DNA$
Choose the correct option

The $G_2$ phase of the cell cycle takes approximately how much time of the total cell cycle duration?