IB Biology SL C1.1.2 Role in metabolism
IB Biology SL C1.1.2 Role in metabolism

IB Biology syllabusFirst assessment 2025
Practise defining metabolism and explaining how enzymes control linked reactions in pathways by catalysing each step and reducing activation energy.
How this is tested
- define metabolism as the total enzyme-catalysed reactions in a cell or organism
- explain why each step in a metabolic pathway depends on a specific enzyme
- link enzyme production or inhibition to control of pathway progress
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