Biology notes 8 October 2008

Biology notes 8 October 2008 - October 8, 2008 Lecture 10...

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October 8, 2008 Lecture 10 – Cell cycling The Inheritance of Sameness DNA double helix is relatively stable over time during replication, a template strand of DNA dictates sequence of new DNA by complementary base pairing telomerase ensure that we don’t lose any coding DNA cell cycle controls proofreading, excision repair, and telomerase tend to prevent errors and loss of coding regions cytoskeleton mediates precise separation of replicated chromosomes cell cycle checkpoints ensure DNA is repaired, replicated, and segregated before the next stage Replication Forks: Link to Lec. 9 eukaryote DNA is large replication is semi-conservative, semi-continuous, and bi-directional bi-directional replication from each origin most prokaryotes have circular chromosomes, as do chloroplasts and mitochondria; otherwise it’s all the same prokaryote daughter cells inherit chromosomes that are already part replicated the leading/lagging strand of a given sequence of DNA cannot be
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Biology notes 8 October 2008 - October 8, 2008 Lecture 10...

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