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Lecture 4

Lecture 4 notes.docx

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Biology 1001A
Tom Haffie

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Lecture 4 – Cell Cycle - When bone marrow is extracted they are basically trying to get at these stem cells which can give rise to all other types of cells - When a stem cell divides it produces a new stem cell and another progeny cell - The progeny cell then divides and differentiates into all the different sorts of mature blood cells that we need How Do Eukaryotes Replicate 3 Billion Base Pairs so Fast? - Eukaryotes do not have faster polymerases - But Eukaryotes have lots of replication origins all firing off at once - Many origins and more polymerase makes it replicate faster - The polymerase runs slower than it would in a prokaryotic cell - The top, middle and bottom DNA are all chromosomes - When something replicates its DNA
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