The cells which enter $G_0$ phase start differentiating into specific types of cells.

In which of the following phases does the amount of genetic material double?

Select the correct statements regarding $S$-phase of interphase:
$I.$ Occurs between $G_{1}$ and $G_{2}$ phases.
$II.$ $DNA$ replication begins in the nucleus.
$III.$ Centrioles duplicate in the cytoplasm.
$IV.$ As $DNA$ is doubled,the number of chromosomes also doubles.
The option with correct statements is:

During the interphase,which of the following occurs?

Two key events take place during $S$ phase in animal cells: $DNA$ replication and duplication of centriole. In which parts of the cell do these events occur?

Select the correct sequence of a cell cycle.