Interpreting Limiting Factor Graphs
Exam questions often show several curves on one graph, each measured under different conditions. The key skill is deciding which factor is limiting at each point.
Use two rules:
1. Where a curve is rising, the factor on the x-axis is limiting, because increasing it increases the rate.
2. Where a curve has levelled off, the x-axis factor is no longer limiting. Compare curves: the factor that differs between two plateaus was limiting the lower one.
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All 17 lessons in Energy for Biological Processes · All AQA A-level Biology topics