Respiration in Single-Celled Organisms (AQA A-Level Biology): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the role of methylene blue in this respiration investigation?
What is the role of methylene blue in this respiration investigation?
It accepts electrons and changes colour
What colour change occurs when methylene blue accepts electrons during respiration?
What colour change occurs when methylene blue accepts electrons during respiration?
Blue to colourless
What is the independent variable in this investigation?
What is the independent variable in this investigation?
Temperature
What is the dependent variable measured in this investigation?
What is the dependent variable measured in this investigation?
Time for methylene blue to become colourless
How is the rate of respiration calculated in this investigation?
How is the rate of respiration calculated in this investigation?
Why must the yeast and glucose solution be buffered?
Why must the yeast and glucose solution be buffered?
To maintain constant pH
How long should test tubes equilibrate in the water bath before adding methylene blue?
How long should test tubes equilibrate in the water bath before adding methylene blue?
10 minutes
What does the optimum temperature represent in this investigation?
What does the optimum temperature represent in this investigation?
Temperature with highest respiration rate
What happens to enzymes at temperatures significantly above the optimum?
What happens to enzymes at temperatures significantly above the optimum?
They denature
What should be plotted on the y-axis when presenting the data?
What should be plotted on the y-axis when presenting the data?
Rate of respiration