A-Level Biology OCR A
Rate Enzyme Increasing Increases Substrate Explain Conc Affects
| Front |
Explain how increasing enzyme conc. affects the initial rate of an enzyme-controlled reaction. |
| Back |
Increasing enzyme concentration:- As enzyme concentration increases, more active sites are available and reaction rate increases
- This leads to more frequent successful collisions between substrate and enzyme
- This increases the rate of formation of ES complexes
- Therefore, rate increases
- Rate stops increasing when substrate starts to run out and enzymes collide more often with each other than with substrate
- At this point enzyme is no longer limiting and increasing conc will not affect rate (Vmax) because there will be nothing for enzymes to bind to
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A-Level Biology OCR A