... take in too much water by osmosis as they do not have a cell all to contain it. However, for plant cells, osmosis makes them swell up when they are surrounded by weak solution and makes the flaccid cells to ...

... has been absorbed by osmosis. Here is a diagram of a turgid cell: A flaccid cell occurs when there is less water concentration outside of the cell than there is inside the cell. This takes place if the cell is placed ...

... of sucrose solution - If the sucrose solution is changed, osmosis will change in rate and direction. Dependent variables = Change in mass of potato. (Water movement in and out) External variables = Size and shape of potato - If the ...

... be more active places for a reaction to take place, which will cause more chemical reactions because of successful collisions because of the active site of the enzyme and substrate. Apparatus · Hydrogen peroxide (H2O2) · Water (H2O) · Bung · Conical flask x2 · Delivery ...

... ...

... water and escaping substances. The general term osmose (now osmosis) was introduced in 1854 by a British chemist, Thomas Graham. If a solution is separated from the pure solvent by a membrane that is permeable to the solvent but not ...

... It will speed up a reaction or just facilitate the reaction on its own. The more enzyme that is present in the reaction the faster the reaction will take place, and the more products will be formed. An enzyme is ...

... with a paper towel, in order to remove excess water. Then, the tissue is weighed again. Results Solution (molarity of Sucrose) Original Mass (g) Final Mass (g) Texture 0.0 5.58 4.82 Turgid 0.2 5.30 4.49 In between 0.5 5.44 3.84 Flaccid 1.0 4.89 3.27 Flaccid 1.5 5.63 3.46 Flaccid Original (g) Final (g) Change (g) % Change 5.48 4.82 0.66 0.66/5.48*100 12.0% 5.30 4.49 0.81 0.81/5.30*100 15.3% 5.44 3.84 1.60 1.60/5.44*100 29.4% 4.89 3.27 1.62 1.62/4.89*100 33.1% 5.63 3.46 2.17 2.17/5.63*100 38.5% Analysis By observing the table of results and the bar chart ...

... for each chip because the permeable membrane will have a similar genetic makeup. This will exclude this possible difference from affecting my results. Secondly, I shall attempt to prepare the chips so that they are cut uniformly. This will keep ...

... the same variety of potato for each chip because the permeable membrane will have a similar genetic makeup. This will exclude this possible difference from affecting my results. Secondly, I shall attempt to prepare the chips so that they are ...

... taken and anomalous results can be eliminated. Preliminary experiments showed: Rather than using five large pieces of potato I will use fifteen small pieces and place three in each solution, as this will increase surface area allowing for a faster transfer ...

... normally fairy stable compound, Hydrogen Peroxide decomposes into water and oxygen when heated above 80 C, as well as in the presence of some catalysts such as catalase. Some of the uses of Hydrogen Peroxide are as follows; fuels for ...

... and forms an enzyme-substrate complex. The reaction then takes place immediately and a substrate is either broken down into two or more products (catabolic reaction) or two or more substrates are bonded to make one product (anabolic reaction). The 'induced ...

... has been made a reaction can take place. This is demonstrated in the diagram below: For a reaction to take place the substrate and enzyme must make contact, therefore if more heat is applied to a mixture of enzyme ...

... concentrations inside and outside are not even. This is because the cell wall becomes stretched and prevents any more water entering. The cell is said to be turgid. Cells placed in a concentrated sugar solution lose water by osmosis, as ...

... free water particles in the higher volume of solution, even if the sucrose concentration is higher. Surface area of potato chip The same diameter of cork boerer will be used each time. If the surface area is different then there will be a ...

... the water leaves the chip and goes to the sucrose solution which has a low water concentration. If the concentration of sucrose decreases the mass of the chip increases. This is because the chip has a lower water concentration and ...

... the water leaves the chip and goes to the sucrose solution which has a low water concentration. If the concentration of sucrose decreases the mass of the chip increases. This is because the chip has a lower water concentration and ...

... the cell to the exterior solution. This is because there are more water molecules inside the cell than outside, so there is net movement out of the cells in order to create equilibrium. This is how I think the graph ...

... is doubled, double the amount of enzymes (active sites) are made available to the hydrogen peroxide, so there's double the chance of collisions between the active sites and the hydrogen peroxide. To prove my prediction I will calculate the surface ...

... Potato - Stopwatch - Scalpel - Ceramic tile - Ruler - Water bath (To make sure the water of the hydrogen peroxide is constant) - Distilled water - Apron - Safety glasses - Top pan balance (To measure the weight of the potato more accurately) - Water trough Prediction I predict that ...

... specific, as each enzyme just performs one particular reaction. 4 Catalase is an enzyme found in food such as potato and liver. It is used for removing Hydrogen Peroxide from the cells. Hydrogen Peroxide is the poisonous by-product of the affects ...

... site so it will break down hydrogen peroxide into water and oxygen. The active site can also join two substrates together, for example a dipeptide. The active site isn't just a random hole, it has a specific size and shape, ...

... wound and folded into a precise spherical shape. Hydrogen, ionic, disulphide bonds as well as hydrophobic interactions all hold the chain in its three dimensional shape. The precise shape of the active site, the place at which the substrate is to ...

... be changed into harmless substances. Equation for Catalase Hydrogen peroxide --> water + oxygen 2H2O2 --> 2H2O + O2 I found out that catalase reacts with hydrogen peroxide to give out water and oxygen. Oxygen bubbles produce froth on the surface of the ...