Osmosis — Paper 1 · IGCSE Biology (9-1) 0970

8 Which part of a plant root hair is partially permeable? A the cell sap B the cell surface membrane C the cell vacuole D the cell wall

1 marks

Answer: B

This question in 0970/11 May/June 2018

8 The diagram shows apparatus used to investigate osmosis. The volumes of solutions A, B, C and D were the same at the start of the investigation. After one hour, the solutions had moved up the glass tubes. Which solution was the most concentrated at the start of the investigation? glass glass glass glass tube tube tube tube partially partially permeable permeable membrane membrane water solution solution solution solution A B C D

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2018

7 The apparatus shown was set up. glass tube sugar solution pure water and blue ink partially permeable membrane Some hours later, the water in the beaker had turned blue, and the liquid in the glass tube had moved upwards. Which processes caused these changes? liquid in glass water turned tube moved blue upwards A osmosis diffusion B active transport osmosis C diffusion active transport D diffusion osmosis

1 marks

Answer: D

This question in 0970/11 May/June 2019

7 Some pieces of potato were placed in a very concentrated sugar solution. Other pieces of potato were placed in distilled water. What happened to the mass of the potato pieces in the two liquids? mass of the mass of the potato pieces potato pieces in a very concentrated in distilled water sugar solution A decreased decreased B decreased increased C increased decreased D increased increased

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2019

6 Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar? A B C D

1 marks

Answer: A

This question in 0970/11 May/June 2020

7 The apparatus shown is used to demonstrate osmosis. dialysis tubing acting as a partially permeable membrane Q P The mass of the dialysis tubing and contents was 11.2 g at the start of the demonstration and 9.4 g at the end. Which solutions would cause this change in mass? solution P solution Q A 5% salt solution 10% salt solution B 10% salt solution 5% salt solution C water 5% salt solution D water 10% salt solution

1 marks

Answer: B

This question in 0970/11 May/June 2020

6 Which diagram shows the appearance of a plant cell several minutes after it has been placed in a concentrated solution of sugar? A B C D

1 marks

Answer: A

This question in 0970/12 May/June 2020

7 Uncooked pieces of potato of identical size were placed in different liquids for one hour and then measured. Which liquid will cause a decrease in the size of the piece of potato? A pure water B sugar solution less concentrated than the potato cell contents C sugar solution more concentrated than the potato cell contents D sugar solution with the same concentration as the potato cell contents

1 marks

Answer: C

This question in 0970/12 May/June 2020

7 What are features of osmosis? 0 0O WwW > diffusion is involved «x «Ke \K K requires cell walls \ \ x& x requires a partially permeable membrane <x \ x key /= yes X= no

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2020

8 The diagram shows apparatus which can be used to demonstrate osmosis. 1 2 glass tube liquid level very concentrated concentrated water sucrose solution sucrose solution partially permeable membrane After one hour, what would happen to the liquid levels in the glass tubes? liquid level in liquid level in tube 1 tube 2 A falls falls B falls rises C rises falls D rises rises

1 marks

Answer: D

This question in 0970/12 Oct/Nov 2020

8 A cylinder of potato tissue was placed in a beaker of very salty water. After one hour the mass of the potato cylinder had decreased. Why did this happen? A Salt entered the plant tissue by active transport. B Salt left the plant tissue by osmosis. C Water entered the plant tissue by active transport. D Water left the plant tissue by osmosis.

1 marks

Answer: D

This question in 0970/11 May/June 2021

8 Which row shows features of osmosis in cells? requires F water can water can requires a ; a cell move into move out of cell wall membrane the cell the cell A Jv Jv J J key B Jv x J J J/ = yes Cc Jv Jv x v X =no D x Jv Jv x

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2022

7 The diagram shows some of the apparatus used in an osmosis investigation. dialysis tubing bag containing sucrose distilled water solution In this investigation a dialysis tubing bag was filled with sucrose solution, sealed and weighed. The dialysis tubing bag was then immersed in distilled water for one hour. After one hour the dialysis tubing bag was removed from the beaker, the surface was dried and the bag was reweighed. Which row explains what will happen during the investigation? mass of the dialysis tubing bag at the net movement of net movement of end of the sucrose molecules water molecules investigation A decreased none out of the bag B decreased into the bag out of the bag C increased none into the bag D increased out of the bag into the bag

1 marks

Answer: C

This question in 0970/11 May/June 2023

6 Which statements are correct for both diffusion and osmosis? involves requires ener molecules move from movement of q nergy higher concentration to from respiration ; water only lower concentration A v v v key B Jv Jv x v= yes Cc x x v X =no D x x x

1 marks

Answer: C

This question in 0970/12 May/June 2023

6 The diagram shows an experiment to investigate osmosis in living cells. water potato glass dish concentrated sugar solution What happens to the volumes of water and sugar solution after 12 hours? volume of volume of water sugar solution A decreases increases B increases increases C increases remains the same D remains the same decreases

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2023

8 The diagram shows apparatus used to investigate osmosis. The volumes of solutions A, B, C and D were the same at the start of the investigation. After one hour, the solutions had moved up the glass tubes. Which solution was the most concentrated at the start of the investigation? glass glass glass glass tube tube tube tube partially partially permeable permeable membrane membrane water solution solution solution solution A B C D

1 marks

Answer: D

This question in 0970/12 May/June 2024

8 Which statement about plant support is correct? A The pressure of water inside the cells presses inwards on the cell walls. B The pressure of water inside the cells presses outwards on the cell walls. C The pressure of water outside the cells presses inwards on the cell walls. D The pressure of water outside the cells presses outwards on the cell walls.

1 marks

Answer: B

This question in 0970/12 Oct/Nov 2024

8 The diagram shows four identical pieces of potato plant tissue in test-tubes. The pieces of potato were kept in the test-tubes for six hours. Which piece of potato would have the greatest increase in mass after six hours? A B C D distilled water 5% sugar 20% sugar air solution solution

1 marks

Answer: A

This question in 0970/11 May/June 2025

6 The diagram represents two liquids separated by a partially permeable membrane. membrane left right key molecule of water molecule of a dissolved sustance Which statement describes how the molecules will move by osmosis? A Molecules of the dissolved substance move from left to right. B Molecules of the dissolved substance move from right to left. C Overall, water molecules move from left to right. D Overall, water molecules move from right to left.

1 marks

Answer: C

This question in 0970/12 May/June 2025

6 What are features of osmosis? requires a partially diffusion is requires a permeable involved cell wall membrane A yes no yes B yes no no C no yes yes D no yes no

1 marks

Answer: A

This question in 0970/12 Oct/Nov 2025