04-ch10-DNAWES

04-ch10-DNAWES - Chapter 10 Molecular Biology of the Gene...

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What is the genetic material? What is its structure? How is it copied? How is it expressed? Chapter 10 Molecular Biology of the Gene
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Streptococcus pneumoniae bacterium S strain (virulent) vs. R strain (non-virulent) Predict outcome for each of the following trials. .. inject a live mouse with: live S mouse dies heat-killed S mouse lives live R mouse lives heat-killed R mouse lives live R + heat-killed S mouse dies = discovery of “transforming principle” Frederick Griffith 1920’s
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Frederick Griffith 1920’s “transforming principle”
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virus DNA (or RNA) wrapped in protein coat reproduces using host debate: what is life ? By the early 1950’s, the existence of a biological molecule “blueprint” was known, but its identity was still unclear. ..
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Albert Hershey & Martha Chase 1952 bacteriophage virus during attack, part of the virus enters bacterium, then takes over bacterial systems to produce next viral generation part of the virus is left behind
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04-ch10-DNAWES - Chapter 10 Molecular Biology of the Gene...

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