IB skill practice

Explain enzyme activity and factors affecting rate

Paper 1, Paper 2 5 marks Difficulty 4

Temperature optimum in enzyme graph

An enzyme activity graph in a Auckland microscope workshop rises to a peak and then falls sharply at high temperature. State the reason for the fall after the optimum. Use the labelled diagram, graph, or scale evidence before answering. Enter the answer and choose the interpretation that best matches the biological evidence.

Worked practice: biological evidence and answer

Use the labelled biological evidence first, then connect it to the final answer.