Core Practical: Investigating rate of enzymes (Edexcel GCSE Biology Combined Science): Quizzes
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Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What substance does the enzyme amylase break down in this practical?
What substance does the enzyme amylase break down in this practical?
Starch
Which indicator is used to detect the presence of starch?
Which indicator is used to detect the presence of starch?
Iodine solution
What color does iodine turn when starch is present?
What color does iodine turn when starch is present?
Blue-black
What temperature should the water bath be heated to and maintained at?
What temperature should the water bath be heated to and maintained at?
35°C
What volume of amylase solution should be added to the boiling tube?
What volume of amylase solution should be added to the boiling tube?
3cm³
How often should samples be taken from the boiling tube?
How often should samples be taken from the boiling tube?
Every 10 seconds
What formula is used to calculate the rate when only measuring time?
What formula is used to calculate the rate when only measuring time?
What is the optimum pH for amylase activity according to the results?
What is the optimum pH for amylase activity according to the results?
pH 7
Which of these is a control variable in this experiment?
Which of these is a control variable in this experiment?
Volume of amylase solution
What safety equipment must be worn throughout the experiment?
What safety equipment must be worn throughout the experiment?
Goggles