You isolate what you think is DNA from a tissue sample.Which of the following will verify that you do,indeed,have DNA (rather than some other type of molecule)?
A)You determine the molecule has carbon-carbon bonds.
B)You determine the molecule has primary and secondary structure.
C)You determine the molecule contains nitrogen and phosphorus.
D)None of answers A-C will verify that the isolated molecule is DNA.

Question

Quizplus · Accepted Answer

None of the options A-C are definitive for identifying DNA. Carbon-carbon bonds and primary/secondary structures are common in many biomolecules, and while DNA contains nitrogen and phosphorus, so do other molecules like RNA. Specific tests, such as DNA sequencing or PCR, are needed to confirm DNA.

You Isolate What You Think Is DNA from a Tissue