Fig. 1 shows a plant cell from a young bean plant placed in a concentrated sugar solution. The cell membrane has pulled away from the cell wall. The same pl...
Question 1 Report
Fig. 1 shows a plant cell from a young bean plant placed in a concentrated sugar solution. The cell membrane has pulled away from the cell wall. The same plant needs enough water in its cells to keep leaves firm and expose a large surface to light for photosynthesis.
(a) Identify the name of the condition shown in Fig. 1. [1]
(b) Explain why the cell membrane has moved away from the cell wall. [2]
(c) Suggest why a plant with many cells in this condition may wilt. [2]
Answer Details
(a) Plasmolysis / plasmolysed [1] (b) Sugar solution is more concentrated / has lower water concentration than cell contents [1]; water leaves through the partially permeable membrane by osmosis [1] (c) Cells lose turgor pressure / become flaccid [1]; they cannot support the leaf so it droops / wilts [1]
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