What Physical Characteristic of DNA is Affected by the Pairing

Question

What physical characteristic of DNA is affected by the pairing of purines with pyrimidines?
A) Its length
B) Its width
C) Its parallel nature
D) Its antiparallel nature
E) Its helix length

Accepted Answer

The pairing of purines (adenine and guanine) with pyrimidines (thymine and cytosine) causes the two strands of DNA to twist around each other, resulting in a helical structure. This pairing also affects the width of the double helix, as purines are larger than pyrimidines.