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In the DNA molecules....

In the DNA molecules.

A

The total amount of purine nucleotides and pyrimidine nucleotides is not always equal.

B

There are two strands which run parall in the `5' rarr 3'` direction.

C

The proportion of adenine in relation to thymme varies with the organism.

D

There are two strands which run antiparallel one is `5' rarr 3'` direction and other in `3' rarr 5'`.

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