Describe enzymes as biological catalysts.

In Catalysts, this learning objective focuses on how to describe enzymes as biological catalysts. Within Rate of reaction, students should keep the idea anchored to Catalysts rather than drifting into a different rate, equilibrium, catalyst, reversible reaction, or graph concept. Key terms to use include catalyst, enzyme, biological catalyst. A strong AQA GCSE Chemistry answer names the exact factor or relationship, explains the particle or equilibrium reason where needed, and links the point back to the question wording with correct units or graph language when relevant.