3. How will the concentration of sucrose in water affect the amount of water that diffuses into or out of the potato cells and thereby change the mass of the potato cells? Hypotheses: 1. If the solution inside the dialysis tubing is hypertonic to the water in the beaker, then the glucose will diffuse out of the bag, and the water will diffuse into the bag, however the starch will remain in the bag. This will occur because the water and glucose are small enough to diffuse out of the pores in the dialysis bag, but the starch molecules are too large to fit through 2.
Effect of Surface Area to Volume Ratio on Diffusion Rate of Glucose from Potatoes Abstract: The experiment was conducted to determine if differences in surface area had a significant effect on diffusion rate of glucose from potatoes. Potato samples of three different lengths were collected through a process of coring along the middle of the vegetable. Cores were soaked in distilled water for a period before an o-dianisidine-enzyme solution was added. Glucose diffusion rates were determined by using a spectrometer after a period of incubation of the potato samples. Glucose levels were measured at 0.52, 0.57, and 0.67 showing that an increase in surface area corresponded with a non-significant (p=0.096) increase in the glucose diffusion rate.
This reaction can be delayed or prevented in fruits and vegetables by the addition of acids, such as lemon juice, and by cooking (Hemelstine, 2004). In this experiment, the effect of pH on the rate of reaction of the enzyme catecholase will be examined. Since it has been found previously that acid can inhibit this enzyme (Hemelstine, 2004), this study will examine the effects of alkaline pH on enzyme activity. The prediction of this study is that as pH increases (becomes more basic), catecholase reaction rate will decrease. Materials and Methods Catecholase activity was determined as described by Ainsworth et.
Pg. 1 The Effects of Catachol with Potato Extract Abstract: The effects of enzymes and substrate concentration on catecholase activity for Ph were determined in this experiment. To get the results, we mixed potato extract with catachol and then exposed it to different Ph levels. The Hypothesis that was being tested was to see if more amounts of H2O, catechol and the potato extract were added, would the reaction rate go up. Also if we added higher amounts of extract will it produce high color intensity.
Question: How do different salinities affect a seeds ability to germinate? 2 pt Hypothesis: I hypothesize that the seeds in a lower salinity will germinate more. 2 points Prediction: If seeds are place in a bag with a lower salinity, then they are going to germinate more than those in a higher salinity solution. 2 points Materials: • • 60 red kidney beans solutions of 0.0% salt (tap water), 0.20% salt, 0.6.0% salt, 1.0% salt, 1.5% salt 5 paper napkins New package • • 5 plastic baggies with holes cut in them for
As sucrose enters the phloem the concentration of phloem sap increases. This causes the entry of water by osmosis from the surrounding cells 5. Water pressure is lower in the sink and therefore, this results in the water and dissolved solutes to flow towards a SINK 6. A sink is a region of the plant where sugars and other nutrients are actively being removed from the phloem. As sucrose moves out of the phloem sap and into surrounding cells (with energy), water flows out of them.
However, just the same, negative reviews can reduce the demand. An example would be: “a definitive finding that the caffeine in coffee contributes to heart disease, which is currently being debated in the scientific community, could change preferences and reduce the demand for coffee.” (Principles of Economics) In this case, the price would go down. When something is in shortage for any reason, the price of the product goes up because there’s less of it to go around. For coffee in particular, droughts may affect how many beans can be harvested. The textbook says, “Storms, insect infestations, and drought affect agricultural production and thus the supply of agricultural goods.
Review the effect of pH on enzyme function. Students should understand that enzymes function best at specific pH levels (which vary depending on the enzyme). Non-optimal pH levels can affect the shape of the enzyme, thereby decreasing its effectiveness as a catalyst. Extreme pH levels can permanently denature the enzyme protein, whereas less extreme pH conditions may only temporarily alter . Lactase is effective at pH 2 – 7 (including dH2O) and therefore breaks down the lactose sugar in milk into glucose and galactose.
Cholesterol also makes the membrane less fluid by restraining the movement of phospholipids and lowers the temperature required to solidify the membrane. Complete depletion of cholesterol and sphingolipids results in cell death as their presence allows permeability to small molecules such as ions, glucose, and water. How does temperature affect lipid membrane? A membrane remains fluid as the temperature decreases, until it solidifies once it hits a critical temperature. The temperature at which a membrane solidifies depends on its fatty acid composition.
The two diets differ in the phases used to lose the weight. The Atkins diet has four different phases. Phase one is the Induction phase. The goal of this phase is to induce Benign Dietary Ketosis, a situation where fat metabolites show up in the urine. Atkins likes ketosis (People eat fewer carbohydrates, their bodies turn to fat for energy, so it makes sense that more ketones are generated.