During which phase of the cell cycle the cellular content of DNA is doubled -
There are two resting phases and two active phases in the cycle.
Resting phases → G1 & G2
Active phases


S-phase (synthetic phase) - As the name suggests, synthesis of new DNA takes place, i.e. doubling of DNA occurs.
M-phase (mitotic phase) - Mitosis takes place and the daughter cells receive one copy of DNA. In this phase, cell number is doubled.
Mitotic phase
G1 phase
G2 phase
S phase