Question

In the DNA molecule

• A. The total amount of purine nucleotides and pyrimidine nucleotides is not always equal.
• B. Proportion of adenine in relation to thymine varies with the organism
• C. There are two strands which run parallel in the 5'-3' direction.
• D. There are two strands which run antiparallel - one in 5'-3' direction and other in 3'-5' direction

Answer 1

The correct option is D

There are two strands which run antiparallel - one in 5'-3' direction and other in 3'-5' direction

The two chains have anti-parallel polarity which means one chain has the polarity 5′-3′ while the other has 3′-5′.