For a cell,$n \rightarrow 2n$ $(P)$ and $2n \rightarrow n$ $(Q)$. What are $P$ and $Q$?

In which phase does $RNA$ and protein synthesis occur?

$A$ single cell containing a large number of nuclei is called:

Which of the following types of cell division is a characteristic feature of chondrocytes,the macronucleus of Paramecium,and embryonic membranes?

Following are the stages of cell division :
$A$. Gap $2$ phase $B$. Cytokinesis
$C$. Synthesis phase $D$. Karyokinesis
$E$. Gap $1$ phase
Choose the correct sequence of stages from the options given below :

$A-$ In the cell cycle,the division of a cell,$DNA$ replication,and cell growth occur.
$R-$ At the end of meiosis,there are $4$ daughter cells with a new genetic composition.