Science · Grades 10–12
Enzymes and interpreting rate data · revision card
Enzymes increase reaction rate by providing a pathway with a lower activation-energy barrier.
Keep these ideas clear
Catalysis
Enzymes increase reaction rate by providing a pathway with a lower activation-energy barrier.
Read the conditions
Temperature, pH, substrate concentration and enzyme concentration can affect the measured rate.
Two useful examples
Which quantity is lowered by an enzyme-catalysed pathway?
activation energy
activation energy
An enzyme acts on a molecule that binds at its active site. That molecule is called the
substrate
substrate
Explain it without looking
- A graph reaches a plateau as substrate concentration rises. Give one possible interpretation under fixed enzyme concentration.
Further reading and review references
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Learning preview · teacher review required. Grade bands are approximate, not official curriculum alignment.