Discussion Week 2

Discussion Week 2 - Samantha Wong SLW004@ucsd.edu Weds 1-2...

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Samantha Wong SLW004@ucsd.edu Weds 1-2 Café Roma Experiments, transcription/translation, mutations, DNA Replication, Mitosis Experiments Levene (tetra-nucleotide theory) Griffith (type II/ type III S Bacteria) (What is transforming principle?) Avery, Macleod, McCarty(transforming principle is actually DNA) o Experiment: is the transforming principle DNA, RNA, or proteins? Type IIIS bacteria, added enzymes RNase o Destroy RNA o Found type IIIS/IIR Protease o Destroy Protein o Found IIS/IIR DNase o Destroy DNA o Found IIR Added Type IIR bacteria Looked at Results Type IIR IIIS DNA=transforming principle Chargaff-(discovered base ratios of DNA) o Experiment: took DNA from different organisms Found amounts of A and T, U and C were similar for each species Hershey and Chase (DNA is genetic material in bacteriophages) o Experiment: Ecoli, grew it in radioactive 35Sulfur (radioactive sulfur) and 32Phosphorous (radioactive phosphorous)
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Discussion Week 2 - Samantha Wong SLW004@ucsd.edu Weds 1-2...

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