BIOL 1201 Lecture : Ch15 Lecture Presentation Rev Spr 14
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Cindy s. malone, phd, california state university northridge. Dna replication and repair preserve genetic information by asking by analyzing. Researchers knew and understood that chromosomes were comprised of dna and protein. Did not know whether genes were comprised of dna or protein. The general consensus at the time supported the hypothesis that genes were comprised of proteins. Comparison to dna, which is comprised of only four different nucleotides. To study whether genes were made of protein or dna. Hershey and chase studied how a virus called t2 infects the bacterium escherichia coli. T2 infection of e. coli begins when. The virus attaches to the cell and injects its genes into the cell. These genes then direct production of new virus particles. During infection, the protein coat, or capsid, of the original parent virus is left behind as a ghost attached to the exterior of the cell.
