Summary
An overview of the interphase stage of the cell cycle, covering DNA replication in the S phase and cellular growth during G1 and G2 phases.
Highlights
Introduction to Interphase and IB Standards00:00:17
Introduction to the interphase portion of the cell cycle, specifically addressing IB understandings regarding DNA replication as a prerequisite for division and the metabolically active nature of cell growth.
The S Phase: DNA Replication00:01:54
Explanation of the S (synthesis) phase, where DNA replication occurs. It details how non-duplicated homologous chromosomes become sister chromatids held together by a centromere, preparing the cell for mitosis.
Cell Growth: G1 and G2 Phases00:05:33
Breakdown of the growth phases. G1 involves accumulation of proteins and nucleotides for growth. G2 focuses on final preparations, including the increase of organelles like mitochondria and chloroplasts and the condensing of chromatin into chromosomes before M phase.