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What did Erwin Chargaff observe about double-stranded DNA?
AThe ratios vary from species to species
BThe ratios each equal one half
CA to T and G to C ratios each equal two
DA to T and G to C ratios each equal one
Answer & Solution
Correct answer: D. A to T and G to C ratios each equal one
Chargaff found adenine equals thymine and guanine equals cytosine in amount, so both ratios are one, which supported base pairing.
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