Enzymes & Metabolism (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
Which enzyme breaks down starch to maltose in this practical?
Which enzyme breaks down starch to maltose in this practical?
Amylase
What colour does iodine turn in the presence of starch?
What colour does iodine turn in the presence of starch?
Blue-black
What is the independent variable in the pH enzyme experiment?
What is the independent variable in the pH enzyme experiment?
Buffer solution (pH)
What colour does iodine remain when starch is fully broken down?
What colour does iodine remain when starch is fully broken down?
Brown
Where are drops of iodine placed in this practical?
Where are drops of iodine placed in this practical?
In wells in a spotting tile
How is rate calculated when timing how long starch breakdown takes?
How is rate calculated when timing how long starch breakdown takes?
What equipment can be used to warm the solutions?
What equipment can be used to warm the solutions?
Water bath or electric heater
What factor must be controlled when testing different pH values?
What factor must be controlled when testing different pH values?
Temperature
When are drops of solution taken during the experiment?
When are drops of solution taken during the experiment?
At regular intervals
What equation calculates rate from change and time?
What equation calculates rate from change and time?
What substance does the enzyme amylase break down?
What substance does the enzyme amylase break down?
Starch
What indicates that starch is no longer present in the solution?
What indicates that starch is no longer present in the solution?
Iodine stays brown