Ribonuclease,a mitotic poison,inhibits the cell cycle at which stage?

The interphase is divided into three main phases. These phases are:

Which is the longest phase in the cell cycle?

Some dividing cells exit the cell cycle and enter a vegetative inactive stage. This is called the quiescent stage $(G_{0})$. This process occurs at the end of:

If a cell is diploid $(2n)$ in the $G_1$ phase,then in the subsequent $S$ phase,the cell will remain/become ........

Most organelles show duplication in cell cycle during