Action and Specificity (Leaving Cert Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What is the active site of an enzyme?
What is the active site of an enzyme?
Region where substrate binds & reacts
What percentage of the total enzyme structure is the active site?
What percentage of the total enzyme structure is the active site?
10-20%
Why does the substrate fit into the active site?
Why does the substrate fit into the active site?
They have complementary 3D shapes
In the induced fit model, what happens when a substrate approaches the active site?
In the induced fit model, what happens when a substrate approaches the active site?
The active site changes shape slightly
What is formed when substrate and enzyme combine with bonds?
What is formed when substrate and enzyme combine with bonds?
An enzyme-substrate complex
How many substrate molecules can some enzymes process per second?
How many substrate molecules can some enzymes process per second?
Several thousand
What does enzyme specificity mean?
What does enzyme specificity mean?
Enzyme works with one substrate type
Why do most enzymes only work with one substrate type?
Why do most enzymes only work with one substrate type?
Active site shaped for one substrate
What is denaturation of an enzyme?
What is denaturation of an enzyme?
When active site changes & loses function
At what temperature do enzymes experience permanent damage?
At what temperature do enzymes experience permanent damage?
Above 40°C
What substrate does catalase break down?
What substrate does catalase break down?
Hydrogen peroxide
What are the products when catalase breaks down hydrogen peroxide?
What are the products when catalase breaks down hydrogen peroxide?
Water and oxygen