Required Practical: Enzymes (OCR GCSE Biology A, Combined (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are enzymes?
What are enzymes?
Biological catalysts that speed up reactions
What does amylase break down?
What does amylase break down?
Starch into maltose
What solution is used to test for the presence of starch?
What solution is used to test for the presence of starch?
Iodine solution
How often should drops be tested during the enzyme experiment?
How often should drops be tested during the enzyme experiment?
Every 30 seconds
Which temperatures are used in the amylase temperature experiment?
Which temperatures are used in the amylase temperature experiment?
0°C, 20°C, 40°C, 60°C, 80°C
What is the optimum temperature for human enzymes?
What is the optimum temperature for human enzymes?
Around 37°C
What happens to enzymes beyond their optimum temperature?
What happens to enzymes beyond their optimum temperature?
They become denatured
Which pH values are used in the pH experiment?
Which pH values are used in the pH experiment?
pH 4, 6, 7, 8, 10
When is the rate of enzyme reaction fastest regarding pH?
When is the rate of enzyme reaction fastest regarding pH?
At the enzyme's optimum pH
What can cause an enzyme to denature in the pH experiment?
What can cause an enzyme to denature in the pH experiment?
Deviations from the optimum pH
What indicates that starch has been fully broken down?
What indicates that starch has been fully broken down?
Iodine no longer turns blue-black
Enzymes function best at what type of conditions?
Enzymes function best at what type of conditions?
Specific optimum conditions