If Escherichia Coli,grown for a Period of Time in ¹⁵N,is

question 44

Multiple Choice

If Escherichia coli,grown for a period of time in ¹⁵N,is transferred to ¹⁴N for one generation of DNA replication,the resulting DNA should have ¹⁴N added to all "new" DNA.If conservative replication is occurring,the ¹⁴N-containing "new" DNA will compose:

• A)one strand of all bacterial chromosomes.
• B)both strands of DNA in half of all bacterial chromosomes.
• C)regions dispersed throughout all bacterial DNA.
• D)none of the new DNA;it will only be found in the old DNA.
• E)All of the answer options are correct.

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