Osmosis — Paper 1 · IGCSE Science - Combined 0653

2 Which part of a plant cell is partially permeable? A cell membrane B cell wall C chloroplast D nucleus

1 marks

Answer: A

This question in 0653/11 Oct/Nov 2005

2 A plant cell is placed in a sugar solution that is more concentrated than the cell sap. The diagram shows the appearance of the cell after 10 minutes. cell surface membrane concentrated cell wall sugar solution X Why does space X become filled with sugar solution? A The cell wall and cell surface membrane are both fully permeable. B The cell wall and cell surface membrane are both partially permeable. C The cell wall is fully permeable and the cell surface membrane is partially permeable. D The cell wall is partially permeable and the cell surface membrane is fully permeable.

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2007

2 Which substances may diffuse into and out of plant cells? into plant cells out of plant cells A chlorophyll oxygen B oxygen water C starch chlorophyll D water starch

1 marks

Answer: B

This question in 0653/11 May/June 2010

2 When a plant cell is placed in a dilute solution of red dye, the contents of the cell do not become red. What prevents the dye molecules from entering the cell? A cell surface membrane B chloroplasts C cytoplasm D vacuole

1 marks

Answer: A

This question in 0653/12 Oct/Nov 2010

2 Uncooked pieces of potato of identical size were placed in different liquids for one hour. 1 pure water 2 sugar solution less concentrated than the cell contents 3 sugar solution more concentrated than the cell contents 4 sugar solution of the same concentration as the cell contents After this time, which liquids will cause an increase in the size of the pieces of potato? A 1, 2 and 4 B 1, 3 and 4 C 1 and 2 only D 1 only

1 marks

Answer: C

This question in 0653/11 May/June 2019

2 Which substance moves through a partially permeable membrane by osmosis? A hormones B oxygen C sugar D water

1 marks

Answer: D

This question in 0653/13 May/June 2019

2 What is osmosis? A the movement of salt across a cell wall B the movement of salt across a partially permeable membrane C the movement of water across a cell wall D the movement of water across a partially permeable membrane

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2019

2 What is osmosis? A the movement of salt across a cell wall B the movement of salt across a partially permeable membrane C the movement of water across a cell wall D the movement of water across a partially permeable membrane

1 marks

Answer: D

This question in 0653/13 Oct/Nov 2019

3 The cytoplasm of a plant cell contains a 15% sugar solution. The plant cell is placed in sugar solutions of different concentrations. In which solution would there be a net diffusion of water out of the cell? A 5% sugar solution B 10% sugar solution C 15% sugar solution D 20% sugar solution

1 marks

Answer: D

This question in 0653/11 May/June 2020

3 The diagram shows a plant palisade mesophyll cell. X What will happen to structure X if this cell is immersed in distilled water or concentrated salty water? structure X structure X in concentrated in distilled water salty water A shrink shrink B shrink swell C swell swell D swell shrink

1 marks

Answer: D

This question in 0653/12 May/June 2022

2 Two pieces of potato are cut to have exactly the same mass and shape. The mass is measured and recorded. concentrated water salt solution potato piece potato piece One piece of potato is placed in water and the other piece is placed in concentrated salt solution. They are both left for one hour. The mass of each piece of potato is then measured again. What happens to the mass of each piece of potato? mass of potato mass of potato placed in concentrated placed in water salt solution A decreases decreases B decreases increases C increases decreases D increases increases

1 marks

Answer: C

This question in 0653/12 Feb/March 2023

1 What is osmosis? A the movement of salt across a cell wall B the movement of salt across a partially permeable membrane C the movement of water across a cell wall D the movement of water across a partially permeable membrane

1 marks

Answer: D

This question in 0653/12 Oct/Nov 2023

1 What is osmosis? A the movement of salt across a cell wall B the movement of salt across a partially permeable membrane C the movement of water across a cell wall D the movement of water across a partially permeable membrane

1 marks

Answer: D

This question in 0653/13 Oct/Nov 2023

2 Which row is correct for osmosis? requires a partially involves the permeable membrane movement of water A no no B no yes C yes no D yes yes

1 marks

Answer: D

This question in 0653/12 May/June 2024

3 Which substance moves through a partially permeable membrane by osmosis? A amino acids B oxygen C sugar D water

1 marks

Answer: D

This question in 0653/11 May/June 2025

2 Which structure stops the cell from bursting when the cell is placed in distilled water? B A C D

1 marks

Answer: C

This question in 0653/11 Oct/Nov 2025