What occurs during the synthesis phase ($S$ phase) of the cell cycle?

In which phase is the centrosome observed to be duplicated?

Transcription process in eukaryotes occurs during i and ii phases of cell cycle.

It is said that one cycle of cell division in human cells (eukaryotic cells) takes $24$ hours. Which phase of the cycle do you think occupies the maximum part of the cell cycle?

Which of the following processes occur during the cell cycle?

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