Question

Given the sequence of one strand of a DNA helix, provide the sequence of the complementary strand and label the 5' and 3' ends.

5'-GCATTCGTGGGTAG-3'

Answer 1

The complementary DNA strand sequence is 3'-CGTAAGCACCCTAC-5', with the 5' end-labeled at the beginning (left) and the 3' end-labeled at the end (right).

Step-by-step explanation:

The sequence of the complementary DNA strand can be determined by pairing each base in the original strand with its complementary base. In DNA, adenine pairs with thymine (A-T), and cytosine pairs with guanine (C-G).

Given the sequence 5'-GCATTCGTGGGTAG-3', the complementary strand would be 3'-CGTAAGCACCCTAC-5'. In this sequence, the 5' end is labeled at the beginning (left) and the 3' end is labeled at the end (right).