Biology 1202B Lecture Notes - Lecture 2: Dna Replication, Ancient Dna, Streptococcus
15 Jun 2016
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Proteins serve far more functions than just enzymes. Dna replication transcription makes rna translation creates proteins. Compared single nucleotide polymorphisms: catalogued all sites where all present day humans have the same snp but also differ from neanderthal. Differ at 31389 snps 87 proteins. Extinct in wild, eastern asia populations growing in wild. The structure of dna: incredibly stable molecule. Early 1900"s scientists thought protein was the molecule of heredity: 20 amino acids vs 4 nucleotides. Streptococcus pneumonia: smooth virulent, rough nonvirulent. Living r bacteria transformed by dead s bacteria. Mice injected with live s cells die. Mice injected with live r cells live. Mice injected with heat killed s cells live. Mice injected with heat killed s cells plus live r cells die. Avery did same thing as griffith but didn"t use mice just grew material. Were able to use chemicals which would eliminate these materials. Treated three different samples with three different chemicals.
