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Below is a double stranded DNA composed of one strand containing 15N atoms and the other strand ...

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Below is a double stranded DNA composed of one strand containing 15N atoms and the other strand ...

Below is a double stranded DNA composed of one strand containing ¹⁵N atoms and the other strand containing ¹⁴N atoms. If the cell which contains this DNA is grown for one generation (replication) on ¹⁵N medium and then transferred to ¹⁴N media for a second generation, what would the resulting double stranded DNA molecules look like?

▸ Four molecules; each containing one ¹⁴N strand and one ¹⁵N strand.

▸ Two molecules; one with a ¹⁵N and a ¹⁴N strand, the other with two ¹⁴N strands.

▸ Four molecules; three containing one ¹⁴N strand and one ¹⁵N strand and one molecule with two ¹⁴N strands.

▸ Four molecules; one with two ¹⁵N strands, two molecules with two ¹⁴N strands, and one molecule with one ¹⁴N and one ¹⁵N strands.

▸ Four molecules; all molecules have ¹⁴N strands.

Textbook

General Chemistry: Principles and Modern Applications

Edition: 11^th

Authors: Petrucci, Herring, Madura, Bissonnette

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