Required Practical: Enzymes (OCR GCSE Biology A (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
What does amylase break down?
What does amylase break down?
Starch into maltose
Which solution is used to test for the presence of starch?
Which solution is used to test for the presence of starch?
Iodine solution
What colour does iodine turn when starch is present?
What colour does iodine turn when starch is present?
Blue-black
What indicates that starch has been fully broken down?
What indicates that starch has been fully broken down?
Iodine no longer turns blue-black
How often should drops be taken for testing during the practical?
How often should drops be taken for testing during the practical?
Every 30 seconds
Which temperatures are used in the temperature experiment?
Which temperatures are used in the 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?
When is the rate of enzyme reaction fastest?
At the enzyme's optimum pH
What are optimum conditions for enzymes?
What are optimum conditions for enzymes?
Specific temperature and pH levels