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In the The Meselson-Stahl experiment, Escherichia coli, grown for a period of time in 15N, was transferred to 14N for one generation of DNA replication, the resulting DNA should have 14N added to all "new" DNA. When DNA was extracted from cells one generation after transfer to light medium and analyzed by analytical ultracntrifugation, this DNA was found:
a. in one band/position in the ultracentrifuge tube, consistent either with semiconservative or dispersive models for replication.
b. in two bands/positions in the ultracentrifuge tube, consistent with conservative replication..
c. in one band/position in the ultracentrifuge tube, consistent only with semiconservative replication.
d. in one band/position in the ultracentrifuge tube, consistent only with dispersive replication.
e. in two bands/positions in the ultracentrifuge tube, consistent either with semiconservative or dispersive models for replication..
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In the The Meselson-Stahl experiment, Escherichia coli, grown for a period of time in 15N, was trans...
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