STANDARD Zoology Structure of DNA MCQ Question
In the DNA molecule
The proportion of Adenine in relation to thymine varies with the organism
There are two strands which run antiparallel-one in 5' → 3' direction and other in 3' → 5'
The total amount of purine nucleotides and pyrimidine nucleotides is not always equal
There are two strands which run parallel in the 5' → 3' direction
Correct Answer
Detailed Explanation
DNA consists of two strands that are wrapped around one another to form a double helix. It has antiparallel direction, one in 5' → 3' direction and the other in 3' → 5' direction. It forms complementary base pairing with purine and pyrimidine (A = T and G = C).
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