CIE iGCSE Co-Ordinated Science B3.2 Osmosis Exam Style Questions Paper 2
Question
Pieces of potato of the same length were placed in sucrose solutions of different concentrations.
Their length was measured again after two hours.
At which sucrose concentration were the pieces of potato most flaccid?
▶️Answer/Explanation
Ans : D
Question
When a plant cell is put into a solution that has a lower water potential than the cell, the cytoplasm can pull away from the cell wall.
What is the term for this?
(A) flaccid
(B) plasmolysis
(C) turgid
(D) turgor pressure
▶️Answer/Explanation
Ans: B
Question
What is osmosis?
(A) the diffusion of sugar molecules from a concentrated solution to a dilute solution through a partially permeable membrane
(B) the diffusion of sugar molecules from a dilute solution to a concentrated solution through a partially permeable membrane
(C) the diffusion of water molecules from a concentrated solution to a dilute solution through a partially permeable membrane
(D) the diffusion of water molecules from a dilute solution to a concentrated solution through a partially permeable membrane
▶️Answer/Explanation
Ans: D
Question
An experiment is set up, as shown.
What will happen to the level of coloured liquid at X?
(A) It goes down.
(B) It goes up.
(C) It goes up and then down.
(D) It stays the same.
▶️Answer/Explanation
Ans: A