Required Practical: Osmosis (OCR GCSE Biology A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
Why is a cork borer used to cut potato cylinders in this osmosis experiment?
Why is a cork borer used to cut potato cylinders in this osmosis experiment?
To ensure uniform size
How long are the potato cylinders typically left in the sugar solutions?
How long are the potato cylinders typically left in the sugar solutions?
24 hours
What is the formula for calculating percentage change in mass?
What is the formula for calculating percentage change in mass?
What does the x-axis crossing point (0% change) on the graph indicate?
What does the x-axis crossing point (0% change) on the graph indicate?
Equal water potential
If a potato cylinder gains mass, what does this indicate about the external solution?
If a potato cylinder gains mass, what does this indicate about the external solution?
It is hypotonic
If a potato cylinder loses mass, what type of solution was it placed in?
If a potato cylinder loses mass, what type of solution was it placed in?
Hypertonic solution
What does it mean if there is no significant change in the potato cylinder's mass?
What does it mean if there is no significant change in the potato cylinder's mass?
The solution is isotonic
In osmosis, water moves from areas of _____ water potential to _____ water potential.
In osmosis, water moves from areas of _____ water potential to _____ water potential.
higher; lower
What type of membrane does osmosis occur across?
What type of membrane does osmosis occur across?
Selectively permeable membrane
Why are potato cylinders blotted with paper towels after removal from solutions?
Why are potato cylinders blotted with paper towels after removal from solutions?
To remove excess surface liquid