Higher Biology Practice Questions - Scottish Higher Biology Exam

The two strands of a DNA double helix are described as antiparallel because they run in:

Opposite directions, one 5' to 3' and the other 3' to 5' The same direction, both 5' to 3' The same direction, both 3' to 5' Perpendicular directions at right angles to each other

Correct Answer:

Opposite directions, one 5' to 3' and the other 3' to 5'

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