Purpose of Antiparallel DNA Strands
Which of the following best explains why the two strands of a DNA double helix must be antiparallel?
A
The antiparallel structure is required to establish the two distinct sides of the double helix.
B
The strands must run in opposite directions to allow proper hydrogen bonding between complementary bases.
C
Both strands must be oriented with their sugar molecules at the top and phosphate groups at the bottom.
D
The premise is incorrect; the two strands of a DNA molecule are parallel, not antiparallel.
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