How Do Enzymes Work? (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is activation energy?
What is activation energy?
Min. energy to break bonds & form new ones
Why do some reactions occur very slowly under normal conditions?
Why do some reactions occur very slowly under normal conditions?
The activation energy barrier is high
How do enzymes speed up reactions?
How do enzymes speed up reactions?
By lowering the activation energy
Which of these does an enzyme NOT change?
Which of these does an enzyme NOT change?
The final products formed
In an energy profile diagram with an enzyme, what stays the same?
In an energy profile diagram with an enzyme, what stays the same?
Starting & ending energy levels
What effect do enzymes have on reaction speed at body temperature?
What effect do enzymes have on reaction speed at body temperature?
Reactions proceed much more rapidly
Why do living cells need to remove hydrogen peroxide quickly?
Why do living cells need to remove hydrogen peroxide quickly?
It is harmful to cells
What is the role of catalase?
What is the role of catalase?
Breaks down hydrogen peroxide
What are the products when hydrogen peroxide breaks down with catalase?
What are the products when hydrogen peroxide breaks down with catalase?
Water and oxygen
What would happen without catalase in cells?
What would happen without catalase in cells?
H₂O₂ would accumulate & damage cells