Factors Affecting the Rate of Enzyme Activity (Leaving Cert Biology): Flashcards
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Three factors affecting enzyme action rate
Three factors affecting enzyme action rate
Temperature, pH, enzyme inhibitors
Optimum temperature
Optimum temperature
Temperature at which an enzyme works best
Enzyme activity at 0°C
Enzyme activity at 0°C
Zero - molecules cannot move
Effect of rising temperature on enzyme activity
Effect of rising temperature on enzyme activity
Increases rate as molecules collide more often
Temperature above which human enzyme activity decreases
Temperature above which human enzyme activity decreases
Above 37°C
Denaturation
Denaturation
Active site destroyed; enzyme stops working permanently
Optimum temperature range for plant enzymes
Optimum temperature range for plant enzymes
25°C to 35°C
Optimum pH
Optimum pH
The pH at which an enzyme works best
pH scale range
pH scale range
0 to 14
Optimal pH range for many enzymes
Optimal pH range for many enzymes
pH 6 to 8
Effect of extreme pH on enzymes
Effect of extreme pH on enzymes
Denaturation - active site changes shape permanently
Purpose of buffer solution in experiments
Purpose of buffer solution in experiments
Keep pH constant
Enzyme inhibitors
Enzyme inhibitors
Chemicals that attach to enzyme and destroy its shape
Examples of enzyme inhibitors
Examples of enzyme inhibitors
Cyanide, mercury, lead, sarin