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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 parallel in the 5’ `rarr` 3’ direction

C

the proportion of Adenine in relation to thymine varies with the organism

D

there are two strands which run antiparallel one in 5’ `rarr` 3' direction and other in 3‘ `rarr` 5’

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