For a DNA strand composed of the sequence AGT in the 5' to 3' direction, the free phosphate is on the ________ nucleotide and the free hydroxyl is on the ________ nucleotide.
A) T; A
B) A; G
C) A; A
D) G; T
E) A; T

Question

Quizplus · Accepted Answer

The free phosphate group is always attached to the 5' carbon of the first nucleotide in the sequence, which is adenine (A) in this case. The free hydroxyl group is found on the 3' carbon of the last nucleotide in the sequence, which is thymine (T) here.

For a DNA Strand Composed of the Sequence AGT in the 5