By using the same mass of potato slices and putting them in different concentration of solutions for a specific amount of time will tell us how the concentration changes the mass of the potato slice. Therefore changing the rate of osmosis. Hypothesis: I predict that, if the piece of potato was put into a solution that has a high concretion of sucrose then the potato slice would lose mass as it would lose water from its cells because the water is moving out of the cell from a high concentration to a low concentration of water through a semi- permeable membrane. The cell is hypotonic and the solution is hypertonic. Plasmolysis takes place as the cell loses water.
The mass of the before the experiment was ranged from 8.520 g to 18.46g. The weight between each of the potato was different because our goal was to find the percent change in mass, which made the mass of the potato don’t have to be the same. The mass after the experiment was ranged from 7.280g to 15.05g. We could tell the solution concentration in 0.0M, and 0.2M make the potato’s mass increased which making the potato hypotonic. The mass decreased in the solutions of 0.4M, 0.6M, 0.8M, and 1M making them hypertonic.
Osmosis Investigation Aim the aim of this experiment is to investigate the effect of changing the concentration of sucrose on the rate of osmosis in cylinders of potatoes. This would happen by using similar sizes and lengths potato cylinders and applying them to different concentrations of sucrose(0%, 10%, 20%, 40%) in small beakers then measuring the change in mass of the potato cylinders afterwards. Maintaining all variables unchanged such as pH, same size, and a constant temperature. time taken for all potato cylinders will be 30 minutes. Hypothesis If the potato cylinders were put in sucrose concentration where the water potential is higher than the water potential that of the potato itself that would cause the mass of the potato to
So when it comes to obesity, there are two categories of bacteria- ‘fat-loving’ microbes or the selfish bacteria and the good bacteria.These ‘fat-loving’ microbes are known to extract more energy (fat) from the food and thus circulate greater levels of fat in the blood stream. (3)Also, obesity in children has been linked to various factors that detract from flourishing a diverse range of microbiota. These include C-section epidemics, lack of breast-feeding and prolonged use of antibiotics. In the healthy individuals, two major metabolites have been identified as secreted by the gut microbiota: Fasting induced adipose factor (FIAF) and Adenosine Monophosphate kinase (AMPK). In healthy individuals, FIAF prevents the release of fat from triglycerides and thus reduces fat deposition.
Higher Concentration of Sucrose Lowers the Mass of a Potato Independent Variable: Concentration of Sucrose used Dependent Variable: Mass of each Potato after Experiment Constant: Size of Potato being used at room temperature Introduction We learned about hypertonic and hypotonic environments before this lab as well as what takes place during osmosis. Do potatoes loose or gain mass when soaked in specific solutions such as sugar or salts? Sugar is a large molecule and has low permeability. Potatoes are a starch which means it is composed of many polysaccharides, therefor has low permeability. Salts are also molecules with low permeability.
Having different temperatures of potatoes would help us see which one of three potato temperature would produce more enzymes. The dependant variable was the the amount of activity (bubbles) produced. Measuring this would help us determine which temperature of potato produced more activity. The potato with the most bubbles, the room temperature potato, would be the one with the most enzyme activity. There were many controlled variables.
Germinating peas and maize respire at faster rates than fresh and dried peas and maize at room temperature and 400C(graph no). This could be because pea seeds have two cotyledons as compared to the single one of maize so oxygen usage is also more. These results support my hypothesis stated earlier. Respiration is an enzymatic process where enzymes are required at every step in the breakdown of glucose. At 600C for both peas and maize the respiration rate went down as the enzymes denatured.
The difference in microbiomes associated with the diet differences are parallel to those observed between carnivorous and herbivorous mammals. An overrepresentation of the number of enzymes involved in the degradation of amino acids such as aspartate, proline, glutamine, ornithine, and lysine were observed. An overrepresentation of enzymes that were involved in the degradation of simple sugars, sugar substitutes, and host glycans were also observed in the US gut microbiome. The gut microbiome observed in Malawians and Amerindians had an overrepresentation of α-amylase, which is involved in the degradation of
Discussion The effect of different concentration on the percentage change in mass while osmosis was observed, and each experiment was performed by calculating the initial and final masses of the potato pieces and the small bag of Visking tube. According to the table 1 and graph 1, the effect of concentration was identified as the concentration of sucrose increase the percentage change in mass of potato also increase because sucrose is hypertonic solution which means that it has a higher amount of particles dissolved in the solution, while a hypotonic solution such as water where there are fewer particles dissolved. When the potato was put in sucrose concentration where the water potential is larger than that of the potato to the sucrose then mass increased. As it can be seen from the graph, the highest percentage change in mass was in the pure water, the percentage was constituted
is the results of the effect of enzyme concentration on the potato enzyme. The 100% enzyme concentration had the highest average rate of O2 production being 7.79ml/min. This is because when there is a 100% concentration there is more molecules of the catalase for the hydrogen peroxide to react with. As the concentration is being diluted, the concentration of the catalase is decreasing so the molecules are less likely to collide and react. When the enzyme is at a 0% concentration there should not be any 02 produced and this is where some errors may have occurred.