Question

What is the direction of the coding strand?

Options

• 5′→3′

• No defined direction

• 3′→5′

• 3′→3′

Answer 1

The coding strand runs in the 5′→3′ direction. Its sequence is identical to the mRNA produced during transcription, except that the coding strand contains thymine where the mRNA contains uracil, which is why it is called the coding strand.