Question

Which single-strand DNA will match much properly with the given single-strand 3’-ATGCGC-5’?a) N/Ab) 3’-ATGCGC-5’c) 3’-TACGCG-5’d) 5’-TACGCG-3’e) 5’-ATGCGC-3’

Answer 1

Answer:

d) 5’-TACGCG-3’

Explanation:

In DNA, adenine (A) and thymine (T) are complementary base pairs, and cytosine (C) and guanine (G) are also complementary base pairs. Hydrogen bonds form between complementary nitrogenous bases on the interior of DNA.

The proper orientation is 5´-3´ because in the question you have a sequence that goes from 3´-5. Polynucleotides have a free 5' phosphate group at one end and a free 3' hydroxyl group at the other end. By convention, these sequences are named from 5' to 3'.