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This is a Unit 2 and Unit 3 slice. It is not complete AP Biology. Units 1 and 4–8 are not published.

Unit 3 · enzyme

Enzymes as biological catalysts

Anannt Education · expert-reviewed original · lesson v1.0 · about 18 min

Performance objective

Explain that enzymes raise rate by lowering activation energy and are regenerated, not consumed as reactants.

The investigation will tempt a ‘used up’ story when a graph plateaus.

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