What advantage does Golden Gate assembly offer over traditional cloning?

• A. Requires multiple rounds of ligation for accuracy
• B. Scarless, ordered assembly of multiple fragments using type IIS restriction enzymes in a single reaction
• C. Cannot assemble multiple fragments in one pot
• D. Leaves recognizable scar sequences between fragments

Answer: (B)

Golden Gate assembly uses type IIS restriction enzymes that cut outside their recognition sites, so you can design unique overhangs to dictate the exact order and orientation of multiple DNA fragments. Because the enzyme’s recognition site is removed during ligation, the final construct is scarless—no extra bases between fragments. All pieces can be joined in a single digestion-ligation reaction, allowing efficient, one-pot assembly of several fragments in a defined order. Traditional cloning, by contrast, relies on standard restriction enzymes that cut within the recognition site and often leaves scars, typically requiring multiple steps to piece together fragments in a specific sequence. This combination of scarless, ordered, multi-fragment assembly in one reaction is the key advantage.