An investigation of the glucose concentration of the cell sap in potato

An probe of the glucose slow-wittedness of the carrel check reveal in potato cellsIn this examine I intend to analyze the set up of osmosis onpotato cells. Specifically, I intend to use my knowledge of osmosis toinvestigate the glucose submersion of the cell muggins in potato cells.Osmosis is a mode by which weewee system levels on each side of a fishing tacklepermeable membrane may balance themselves. It over pay backs between regionsof uplifted wet concentration and low water supply supply concentration. As it is aspecial method of diffusion exclusive to water, it alike allows diluteand concentrated solvings to balance their strengths. It does this bypreventing large non-water referenceicles from spreeing by means of thesemi-permeable membrane due to their size, in rule that the waterlevels on any side may stand for, regardless of the solutions early(a)contents.Osmosis is passive, that is to say it does not overtop energy in orderto be performed. Th is is because it occurs solely between regions ofhigh and low water concentration.The direction and facilitate of osmosis depends on the two solutionsosmotic capability. This is the measure of the pressure by which thewater molecules of a solution dole out across a semi-permeablemembrane. A solutions potential is defined by its concentration. The more than soluble a solution has in it, the lower its water concentrationand the lower its osmotic potential. In the pillow slip below sugarmolecules run the soluble.Cell sap is contained in the vacuole of a cell and is a part glucose,part water solution. The membrane of the cell acts as a semi-permeablemembrane across which osmosis occurs (see below). In the case ofosmosis into and out of the vacuole, it occurs across two membranes -the plasmalemma and the tonoplast. When osmosis occurs, water mayenter or furnish the vacuole according to the concentration of thesubstances internal and outside the potato cell. In the specimen below wesee what would kick downstairs if a plant cell were skirt by pure water.As pure water has the highest water concentration possible, osmosiswill invariably occur into the cell vacuole, which by definitioncontains a solution lower water concentration.The plant cell will take in as much water as is needed to servethe water levels on either side of the membrane equal. As the glucosemolecules cannot pass out of the cell to equate the water levels, thevolume of cell sa... ...order to sire awider and more nice base of secernate.There is scope for make headway probe of the topic in order toobtain further evidence and draw a more accurate conclusion. Forexample, now the concentration of potato cell sap has been setat about 15%, a smaller range of solution strengths could be used inan other identical experiment 5 solutions of 10% and 20%concentration for example. Alternatively, investigations could beconducted into the effects of osmosis on variant vegetables or morewidely pla nts in general. For further information on the potato, thesame experiment could be conducted utilize samples from different partsof the plant. This would hit whether different areas of a plant study differing levels of sucrose in their cell sap. Any of thesesuggestions would both help to throw my conclusion and extend theinvestigation in general further.Bibliography- GCSE biology D. G. Mackean- biology for You Gareth Williams- The Times GCSE Revision Guides - Biology PC CD ROM- Hutchinsons multimedia Encyclopaedia PC CD ROM- www.britannica.com- www.bbc.co.uk/education- www.homeworkhigh.com/science- www.learn.co.uk An investigation of the glucose concentration of the cell sap in potatoAn investigation of the glucose concentration of the cell sap in potato cellsIn this experiment I intend to investigate the effects of osmosis onpotato cells. Specifically, I intend to use my knowledge of osmosis toinvestigate the glucose concentration of the cell sap in potato cells.Osmosis is a method by which water levels on either side of a semipermeable membrane may balance themselves. It occurs between regionsof high water concentration and low water concentration. As it is aspecial method of diffusion exclusive to water, it also allows diluteand concentrated solutions to balance their strengths. It does this bypreventing large non-water particles from passing through thesemi-permeable membrane due to their size, in order that the waterlevels on either side may equate, regardless of the solutions othercontents.Osmosis is passive, that is to say it does not require energy in orderto be performed. This is because it occurs solely between regions ofhigh and low water concentration.The direction and speed of osmosis depends on the two solutionsosmotic potential. This is the measure of the pressure by which thewater molecules of a solution diffuse across a semi-permeablemembrane. A solutions potential is defined by its concentration. Themore solub le a solution has in it, the lower its water concentrationand the lower its osmotic potential. In the example below sugarmolecules represent the soluble.Cell sap is contained in the vacuole of a cell and is a part glucose,part water solution. The membrane of the cell acts as a semi-permeablemembrane across which osmosis occurs (see below). In the case ofosmosis into and out of the vacuole, it occurs across two membranes -the plasmalemma and the tonoplast. When osmosis occurs, water mayenter or leave the vacuole according to the concentration of thesubstances inside and outside the potato cell. In the example below wesee what would happen if a plant cell were surrounded by pure water.As pure water has the highest water concentration possible, osmosiswill invariably occur into the cell vacuole, which by definitioncontains a solution lower water concentration.The plant cell will take in as much water as is needed to makethe water levels on either side of the membrane equal. As the gluc osemolecules cannot pass out of the cell to equate the water levels, thevolume of cell sa... ...order to obtain awider and more precise base of evidence.There is scope for further investigation of the topic in order toobtain further evidence and draw a more accurate conclusion. Forexample, now the concentration of potato cell sap has been identifiedat about 15%, a smaller range of solution strengths could be used inan otherwise identical experiment 5 solutions of 10% and 20%concentration for example. Alternatively, investigations could beconducted into the effects of osmosis on different vegetables or morewidely plants in general. For further information on the potato, thesame experiment could be conducted using samples from different partsof the plant. This would establish whether different areas of a planthave differing levels of sucrose in their cell sap. Any of thesesuggestions would both help to support my conclusion and extend theinvestigation in general further.Bibliography- GCSE Biology D. G. Mackean- Biology for You Gareth Williams- The Times GCSE Revision Guides - Biology PC CD ROM- Hutchinsons Multimedia Encyclopaedia PC CD ROM- www.britannica.com- www.bbc.co.uk/education- www.homeworkhigh.com/science- www.learn.co.uk