Q.The correct sequence in cell cycle is

The cell cycle is the ordered series of events by which a cell grows and divides to produce two new cells, first described by Prevost and Dumans in 1824. It is split into interphase (the growth and preparation stage, made of the G1, S and G2 sub-phases) and the M phase (mitosis plus cytokinesis). In a typical proliferating human cell the whole cycle takes about 24 hours, but the two parts are strikingly unequal: interphase alone accounts for roughly 95% of that time (about 11 hours in G1, 8 hours in S and 4 hours in G2), while mitosis and cytokinesis together occupy only about an hour. This lopsided split makes biological sense - interphase is when the cell does the heavy lifting of growth, organelle production and, critically, DNA replication, while the M phase is reserved purely for the mechanical work of separating what has already been built and duplicated. Because a daughter cell produced at the end of one cycle can itself go on to divide again, the cell cycle is conventionally drawn as a continuous loop rather than a straight line. Not every cell cycles continuously: at a checkpoint near the end of G1 a cell can instead exit into a non-dividing resting state, G0.