Organisation: Digestion (AQA GCSE Biology): 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 starch into?
What does amylase break down starch into?
Maltose
What colour does iodine turn when starch is present?
What colour does iodine turn when starch is present?
Blue-black
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
Which pH values are used in the pH experiment?
Which pH values are used in the pH experiment?
pH 4, 6, 7, 8, 10
How often should drops be tested with iodine solution?
How often should drops be tested with iodine solution?
Every 30 seconds
What is the usual optimum temperature for human enzymes?
What is the usual 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
At which pH is the rate of enzyme reaction fastest?
At which pH is the rate of enzyme reaction fastest?
At the optimum pH
What can pH deviations from the optimum cause?
What can pH deviations from the optimum cause?
Enzyme denaturation
What are optimum conditions for enzymes?
What are optimum conditions for enzymes?
Specific temps & pH for best function
What safety precaution is needed with water baths?
What safety precaution is needed with water baths?
Use care to avoid burns