Question

4 over 50 years ago, meselson and stahl investigated the mechanism of dna replication. they transferred a rapidly growing population of escherichia coli from a growth medium containing only 15n to a growth medium with only 14n. dna samples were centrifuged at high speed in a salt density gradient. in the original published research, dna molecules of the same density appear as a band in the uv absorption photographs as shown.

Answer 1

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