The correct answer about double stranded DNA from the task above simply is:
It’s strands have a sugar-phosphate backbone, and the two strands run anti-parallel to each other.
The correct answer choice is option c.
What is meant by double stranded DNA?
DNA simply refers to a deoxyribonucleic acid. When we say double stranded DNA molecule, we are talking about a molecule which consist of two different polynucleotide chains. That being said, the polynucleotide chains if deoxyribonucleic acid contains nitrogenous bases which are connected by hydrogen bonds.
However, from the context of the problem given above, double stranded DNA is anti-parallel to each other simply because the strands contain therein run from 5' to 3'; thereby running in opposite directions from each other.
In conclusion, we can now confirm from the explanation given above that DNA molecule contains nitrogenous bases.
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