Why is buffer pH important in restriction digestion?

Correct answer: To maintain an optimal pH for the restriction enzyme's structure and activity

Restriction enzymes are proteins, and their activity depends on pH. A suitable buffer maintains the optimal pH needed for the enzyme’s structure and active site, allowing DNA to be cut at the correct recognition sites. Dissolving agarose gel is part of preparing for gel electrophoresis, not a function of the digestion buffer. Exam tip: a restriction-digestion buffer primarily provides the correct pH and essential ions.