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 By convention, DNA sequences are written 5' to 3' from left to right. The free phosphate is thus found on the adenine nucleotide, and the free hydroxyl is found on the thymine nucleotide.

Question

Quizplus · Accepted Answer

By convention, DNA sequences are always written 5' to 3' from left to right. In the sequence AGT, the free phosphate is found on the nucleotide with the adenine base (A) at the 5' end, and the free hydroxyl is found on the nucleotide with the thymine base (T) at the 3' end. Therefore, the correct answer is E – the free phosphate is on the A nucleotide and the free hydroxyl is on the T nucleotide.

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