dna replication is the major cellular event that happens during the s phase of interphase.
dna replication is the major cellular event that happens during the s phase of interphase.
what major cellular event happen during the s phase of interphase?
dna replication
interphase is the process a cell must go through before mitosis, meiosis, and cytokinesis. interphase consists of three main phases: g, s, and g. g is a time of growth for the cell where specialized cellular functions occur in order to prepare the cell for dna replication. there are checkpoints during interphase that allow the cell to be either advance or halt further development. in s phase, the chromosomes are replicated in order for the genetic content to be maintained. during g, the cell undergoes the final stages of growth before it enters the m phase, where spindles are synthesized. the m phase, can be either mitosis or meiosis depending on the type of cell. germ cells, or gametes, undergo meiosis, while somatic cells will undergo mitosis. after the cell proceeds successfully through the m phase, it may then undergo cell division through cytokinesis. the control of each checkpoint is controlled by cyclin and cyclin-dependent kinases. the progression of interphase is the result of the increased amount of cyclin. as the amount of cyclin increases, more and more cyclin dependent kinases attach to cyclin signaling the cell further into interphase. at the peak of the cyclin attached to the cyclin dependent kinases this system pushes the cell out of interphase and into the m phase, where mitosis, meiosis, and cytokinesis occur. there are three transition checkpoints the cell goes through before entering the m phase. the most important being the g-s transition checkpoint. if the cell does not pass this checkpoint, then the cell will exit the cell cycle.
cell division
the duration of time spent in interphase and in each stage of interphase is variable and depends on both the type of cell and the species of organism it belongs to. most cells of adult mammals spend about 24 hours in interphase; this accounts for about 90%-96% of the total time involved in cell division.









































interphase includes g1, s, and g2 phases. mitosis and cytokinesis, however, are separate from interphase.









































in g1 phase decision for cell division is taking place...









































section::::interphase within sequences of cellular processes.









































section::::interphase within sequences of cellular processes.:interphase and the cell cycle.
interphase