There is a free _______ group at the 3' position on the sugar at one end of a DNA strand.
A) hydroxyl
B) methyl
C) ethyl
D) phosphate
E) pyrophosphate

Question

Quizplus · Accepted Answer

The 3' end of a DNA strand has a free hydroxyl (-OH) group at the 3' position of the sugar molecule. This hydroxyl group is essential for DNA replication, as it is the site where a new nucleotide is added by DNA polymerase.

There Is a Free _______ Group at the 3' Position