In this video I explain how to interpret a graph showing the effect of pH on enzyme activity and how to draw valid conclusions from the data. We look at how the rate of reaction changes across the pH range and how to identify the optimum pH range. Understanding how to read graphs like this clearly is essential for securing marks on data interpretation questions in biology exams. Hope this helps. – Bipan aka @thealevelexaminer #ALevelBiology #BiologyExaminer #BiologyTutor