what are the three steps that happen during interphase
1 G1 phase: growth stage, cell makes RNAs, proteins, other cellular molecules. 2  S phase: cell duplicates chromosomal proteins, DNA, 3  G2 phase: continues to synthesis proteins/ RNA. 4  G1 phase, time in this stage can vary in length in species. 5  Once DNA replication begins 10-12 hrs through S phase, 4-6 G2, 1-4 mitosis.