Enzymes & Metabolism (AQA GCSE Biology Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What colour does iodine turn in the presence of starch?
What colour does iodine turn in the presence of starch?
Blue-black
Which enzyme is used to break down starch to maltose in this practical?
Which enzyme is used to break down starch to maltose in this practical?
Amylase
What colour does iodine remain when starch has been completely broken down?
What colour does iodine remain when starch has been completely broken down?
Brown
What is the independent variable in this enzyme practical?
What is the independent variable in this enzyme practical?
Buffer solution (pH)
What equation is used to calculate the rate in this practical?
What equation is used to calculate the rate in this practical?
Which variable should be controlled when investigating pH effects on enzyme activity?
Which variable should be controlled when investigating pH effects on enzyme activity?
Temperature
What equipment is used to warm the solution in this practical?
What equipment is used to warm the solution in this practical?
Water bath or electric heater
Where are drops of iodine placed at the start of this practical?
Where are drops of iodine placed at the start of this practical?
In wells in a spotting tile
What equation is used to calculate rate when measuring product formation over time?
What equation is used to calculate rate when measuring product formation over time?
What three substances are warmed together in this practical?
What three substances are warmed together in this practical?
Amylase, starch, and buffer solution