Investigating respiration (Edexcel 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 is the purpose of sodium hydroxide in the respirometer?
What is the purpose of sodium hydroxide in the respirometer?
To absorb carbon dioxide produced
Why are glass beads used in the control tube?
Why are glass beads used in the control tube?
To act as a control for the setup
What safety hazard does sodium hydroxide pose?
What safety hazard does sodium hydroxide pose?
It is corrosive and causes skin burns
Which direction does the coloured liquid move as organisms respire?
Which direction does the coloured liquid move as organisms respire?
Towards the organism tube
What is the formula for calculating rate of respiration?
What is the formula for calculating rate of respiration?
Volume of oxygen ÷ Time (minutes)
What is the unit for the rate of respiration?
What is the unit for the rate of respiration?
cm³/min
Which organisms can be used in this respiration practical?
Which organisms can be used in this respiration practical?
Insects, maggots, woodlice, germinating peas
What causes volume changes in the respirometer?
What causes volume changes in the respirometer?
Oxygen uptake by organisms only
How does increasing temperature affect the rate of respiration?
How does increasing temperature affect the rate of respiration?
It generally increases the rate
Why does temperature increase the rate of respiration?
Why does temperature increase the rate of respiration?
Enzymes work more efficiently
What is the purpose of the water bath in this practical?
What is the purpose of the water bath in this practical?
To control the temperature
What improvement could increase precision in this practical?
What improvement could increase precision in this practical?
Using a digital manometer