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1. In the 1950 s, many scientists thought that proteins, not DNA, carried genetic information. Why
did proteins seem better suited for storing genetic information? Biologists could already visualize
proteins with electron microscopes, and so had an idea of how complex they were Proteins had
more (20 amino acids) units than DNA did (4 nucleotides) Biologists knew that chromosomes were
only comprised of proteins and not DNA DNA seemed too complex to carry information compared
to more simple proteins

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