Chapter 15, Problem 14CONQ

An enhancer, located upstream from a gene, has the following sequence:

5′–GTAG–3′

3′–CATC–5′

This enhancer is orientation-independent. Which of the following sequences also works as an enhancer?

A. 5′–CTAC–3′

3′–GATG–5′

B. 5′–GATG–3′

3′–CTAC–5′

C. 5′–CATC–3′

3′–GTAG–5′