Enzyme Activity: Enzyme Concentration (OCR AS Biology): Revision Note

Exam code: H020

Lára Marie McIvor

Last updated

Enzyme Activity: Enzyme Concentration

  • Enzyme concentration affects the rate of reaction

  • The higher the enzyme concentration in a reaction mixture, the greater the number of active sites available and the greater the likelihood of enzyme-substrate complex formation

  • As long as there is sufficient substrate available, the initial rate of reaction increases linearly with enzyme concentration

  • If the amount of substrate is limited, at a certain point any further increase in enzyme concentration will not increase the reaction rate as the amount of substrate becomes a limiting factor

The effect of enzyme concentration on an enzyme-catalysed reaction, downloadable AS & A Level Biology revision notes

The effect of enzyme concentration on the rate of an enzyme-catalysed reaction

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Lára Marie McIvor

Author: Lára Marie McIvor

Expertise: Biology, Psychology & Sociology Subject Lead

Lára graduated from Oxford University in Biological Sciences and has now been a science tutor working in the UK for several years. Lára has a particular interest in the area of infectious disease and epidemiology, and enjoys creating original educational materials that develop confidence and facilitate learning.