The biosynthetic phase of the cell cycle is .........

What happens to the $K.I$ (Karyoplasmic Index) during cell growth?

Which of the following is true for the $G_0$ phase?
$I.$ It is a quiescent stage.
$II.$ The cell cycle is arrested in this stage.
$III.$ $G_0$ cells do not grow or proliferate,but are metabolically active.
$IV.$ $G_0$ cells divide in response to stimuli.

If the amount of $DNA$ is recorded as $2C$ at the beginning of the $S$ phase,what will be its amount at the end of the $S$ phase?

If a dividing cell is placed in a medium containing radioactive thymidine,the radioactivity will first be observed in:

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: