Osmosis Investigation
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Introduction Osmosis is defined as the diffusion of water molecules, down a water potential gradient, across a partially permeable membrane. If the solutions on each side of the partially permeable membrane are equally concentrated then there will be no net movement of water across the membrane. If the solution outside the cell has a low concentration of solute, this causes cells to become turgid as water flows into them, or if the solution outside the cell is of high concentration the cells become plasmolysed as the water flows out. Aim The aim of this investigation is to...
Use a wider range of sucrose solutions.
Use a wider range of sucrose solutions.
?é?À When the potato was dried to remove surface liquid it was not necessarily done the same on each potato, allowing some to weigh more.
?é?À Although the osmotic potential for this investigation was estimated, a more scientific approach would have been better.
?é?À Selecting a better root vegetable to see how the results differ.
These points can all be taken into consideration for a re- test, but I believe this experiment went well and we obtained the results that proved my hypothesis and prediction.
I have to plan and carry out an experiment to investigate the way in which concentration of a substrate affects the rate of an enzyme-catalysed reaction. I will need to carry out some background information to find out what may affect my experiment. Background Information: An...
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Method Ten 50ml beakers were labelled accordingly, e.g. 2 x 0m, 2 x 0.25m, 2 x 0.5, 2 x 0.75 m and 2 x 1m. Distilled water and sugar solution were then measured to vary sugar concentration, into beakers using a pipette. Using a size 4 core borer, sections...
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I plan to see if the body size of an animal affects its heat loss. I am going to do this by using three glass beakers with various amounts of boiling water in them. I will then see which beaker looses its heat the fastest or the slowest....
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INTRODUCTION This piece of biology coursework is about how cells use osmosis, how, why and what affect it has on the cells in question. The example I am going to explore this in and to illustrate this is the experiment of potato chips of the same length in...
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Crop rotation is the practice of growing a series of dissimilar types of crops in the same space in sequential seasons to avoid the buildup of pathogens and pests that often occurs when one species is continuously cropped. Crop rotation also seeks to balance the fertility demands of various...
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