Biology 1201A Lecture Notes - Lecture 1: Spindle Apparatus, Sister Chromatids, Nuclear Membrane
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15 Jun 2016
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Interphase: no dividing phase of cell: gap 1 (g1): When dna synthesis and dna replication occurs: gap 2. When some cells enter this loop and do not actually divide therefore they never progress to s phase. Mitosis: nuclear division therefore only the nucleus is dividing. Normally followed by cytokinesis which is cell division. Cell division = dna replication + mitosis + cytokinesis. Replication doubles the dna content of the cell. Mitosis (nuclear division) distributes replicated dna equally into two nuclei. Cytokinesis divides the cytoplasm into distinct daughter cells. Dna replication is necessary as it ensure the daughter cells each receive complete complement of genetic info. Semi conservative replication due to complementary base pairs. Double helix unwinds as hydrogen bonds break. Some overlap with microtubules from opposite spindle poles b. iii. Ring of parallel microfilaments, mixed with myosin is present below the cell membrane a. ii. Sliding of microfilaments constricts the cell furrow is created a. iii.
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