Factors Affecting the Rate of Enzyme Activity (Leaving Cert Biology): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are the three main factors affecting the rate of enzyme action?
What are the three main factors affecting the rate of enzyme action?
Temperature, pH, enzyme inhibitors
What is the optimum temperature of an enzyme?
What is the optimum temperature of an enzyme?
The temperature at which it works best
What happens to enzyme activity at 0°C?
What happens to enzyme activity at 0°C?
Rate is zero as molecules cannot move
Why does enzyme action increase as temperature rises?
Why does enzyme action increase as temperature rises?
Molecules move faster and collide more
Above what temperature do human enzymes begin to slow down?
Above what temperature do human enzymes begin to slow down?
37°C
What does it mean when an enzyme is denatured?
What does it mean when an enzyme is denatured?
Active site destroyed, can't act on substrate
What is the optimum temperature range for plant enzymes?
What is the optimum temperature range for plant enzymes?
25°C to 35°C
What is the optimum pH of an enzyme?
What is the optimum pH of an enzyme?
The pH at which it works best
What pH values are considered acidic, neutral, and alkaline?
What pH values are considered acidic, neutral, and alkaline?
Below 7, 7, above 7
What is the optimal pH range for many enzymes?
What is the optimal pH range for many enzymes?
6 to 8
What is the purpose of a buffer solution in enzyme experiments?
What is the purpose of a buffer solution in enzyme experiments?
To keep pH constant
Which of these is an enzyme inhibitor that blocks respiration?
Which of these is an enzyme inhibitor that blocks respiration?
Cyanide