150-14DNAstructure[1] - Foundations of Biological Science I...

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Foundations of Biological Science I (BioSci 150) C DNA: Structure of the genetic material
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Foundations of Biological Science I (BioSci 150) C What was known by the 1920’s: Genes are linearly arranged on chromosomes. The nucleus contains chromosomes. DNA = 4 deoxyribose nucleotides, protein = 20 amino acids Speculation: proteins can be more complex than DNA, so they must be the chemicals of genes.
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Foundations of Biological Science I (BioSci 150) C In the 1920’s, Griffith was working on a vaccine against bacterial pneumonia. Instead, he stumbled onto the technology that would reveal the chemical nature of genes. ..
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C Inoculation protocol Results Treatment 1 Treatment 4 Treatment 3 Treatment 2 R strain S strain heat-killed S strain R strain + heat-killed S strain mice live mice live mice die mice die Griffith’s experiment with two strains of Streptococcus pneumoniae time … but no
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150-14DNAstructure[1] - Foundations of Biological Science I...

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