Lecture 7 - 7. Information Transfer I - DNA structure. Iain...

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7. Information Transfer I - DNA structure. Iain McKinnell Dept Biology
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Story so far…cell is the fundamental unit of life Living cells possess a system that stores and passes on information required to make the necessary components (biomacromolecules) needed to sustain life…(both within the cell, and for it’s progeny)
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What do all these cells have in common?
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What does this mean? All somatic cells in an organism are genetically identical They possess the same amount of DNA with the same sequence. Thus there must be a need to pass on the totality of genetic information from mother cell to daughter cell Must be a mechanism to copy it all so it can be transferred to all cell types = Replication
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So what makes these cells different from each other? GENE EXPRESSION Each different cell type will ‘express’ a set of genes (discrete sequences of DNA) from the total DNA in its’ nucleus.
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Information Transfer http://www.brown.edu/Course s/BI0032/repro/malecon.htm http://www.flickr.com/photos/pinksto ckphotos/5264093772/in/photostream/ Cell specialization: Control of gene expression Cell growth & division: Total DNA Replication
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What about prokaryotes? Growth and division Total DNA Replication Control of gene expression often quite complex
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Information Transfer http://www.brown.edu/Course s/BI0032/repro/malecon.htm
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This note was uploaded on 10/20/2011 for the course BIOL 1103 taught by Professor Mckinnel during the Fall '11 term at Carleton CA.

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Lecture 7 - 7. Information Transfer I - DNA structure. Iain...

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