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

An investigation of the glucose ducking of the booth sap in white potato prison prison cellsIn this prove I intend to ask 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 system by which urine 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 depraveand concentrated solutions to balance their strengths. It does this bypreventing large non-water particles from departure 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 fill energy in orderto be performed. This is because it occurs solely between regions ofhigh and low wat er concentration.The heed and speed of osmosis depends on the two solutionsosmotic electromotive force. This is the touchstone of the pressure by which thewater molecules of a solution diffuse across a semi-permeablemembrane. A solutions potential is defined by its concentration. Themore soluble a solution has in it, the lower its water concentrationand the lower its osmotic potential. In the example to a lower place 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 at a lower place). In the case ofosmosis into and extinct 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 within and outside the potato cell. In the example below wesee what would happen if a plant cell were sur rounded by minute water.As pure water has the highest water concentration possible, osmosiswill ever occur into the cell vacuole, which by definitioncontains a solution lower water concentration.The plant cell will take in as lots water as is needed to makethe 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 mother awider and more precise base of evidence.There is scope for kick upstairs 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 polar 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. each of thesesuggestions would both help to support my conclusion and keep up 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 whi ch 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 soluble a solution has in it, the lower its w ater 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 glucosemolecules 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