Which 5′ to 3′ DNA primer is complementary to the template strand 3′-G C A T T A G C-5′?

💡 Explanation:

The structure of DNA (double helix) dictates that strands must be complementary (A pairs with T, G pairs with C) and anti-parallel. The template 3'-G C A T T A G C-5' requires a primer running 5' to 3' with the reverse complement sequence: 5'-C G T A A T C G-3'. This question tests the application of the fundamental principles of DNA structure in molecular biology.