Cellular Respiration Lab Report

Test tube six contained an elodea and was placed in the dark. It was hypothesized that, after a day, the test tube would be yellow in color. Upon observing, the hypothesis was proven correct because test tube six had remained yellow. This is because the elodea was placed in the dark where it could not receive light to photosynthesize and remove carbon dioxide from the

concentration was plotted in order to estimate the concentration of the unknown solution (Figure 3).

The experiment first started by the calculation of the net oxygen production under white light, it started by putting the Elodea in a volumeter tube containing 3% sodium bicarbonate solution, which was assembled to the volumeter by covering the tube with the plug/pipet/syringe assembly (a 1-2cm air space between the bicarbonate solution and the top rubber cover of the volumeter tube should be left.) Then, clamp the volumeter onto the clamp stand using the tube clamp and fill 2000ml beaker with cold tap water. The beaker should be placed on the clamp stand between the volumeter tube and the light lamp. A five minutes stabilization

Cellular respiration is the chemical process in which organic molecules, such as sugars, are broken down in the cell to produce utilizable energy in the form of ATP. ATP is the chemical used by all of the energy-consuming metabolic activities of the cell. In order to extract energy from these organic molecules, cellular respiration involves a network of metabolic pathways dedicated to this task.

To be able to carry on metabolic processes in the cell, cells need energy. The cells can obtain their energy in different ways but the most efficient way of harvesting stored food in the cell is through cellular respiration. Cellular respiration is a catabolic pathway, which breaks down large molecules to smaller molecules, produces an energy rich molecule known as ATP (Adenosine Triphosphate) and a waste product that is released as CO2.

Then we inverted the tubes so an air bubble would form in the little tube that is now upside-down. Now that we know what to do, we marked the little tube 2/3 full. One tube was filled to that line with glucose solution, another with fructose solution, sucrose solution and the last one with water. Next, the little tubes were topped off with a yeast solution. Then we slide a big tube over the little one and completed the inversion, this is done for every little test tube. After they are all inverted our group measured the bubble present at the top of the little tube. Then we put all of the inverted test tubes into a hot water bath for 20 minutes. After 20 minutes we took the tubes out and measure the air bubbles in the tubes. Next, we recorded the data calculated the net change from the beginning of the experiment to after the hot

The first experiment begun by filling a 600-ml beaker, almost to the top, with water. Next, a 10-ml graduated cylinder was filled to the top with water. Once water was added to the beaker and graduated cylinder, a thumb was placed over the top of the graduated cylinder. This would ensure that no water was let out and no bubbles were let into the graduated cylinder. Next, it was turned upside down and fully submerged into the beaker. Then, a U-shaped glass tube was attained. The short end of the glass tube was placed into the beaker with the tip inside of the graduated cylinder. Next, a 50-ml Erlenmeyer flask was received. After, 10-ml of substrate concentration and 10-ml of catalase/buffer solution were placed into the flask. A rubber stopper was then placed on the opening of the flask. After adding these, the flask was held at the neck and spun softly

4.Measure 35mL of warm water and add them into each of the 4 test tubes at about roughly the same time. It is essential that the water is warm. Do not seal the test tube.

ii. The second part of the titration series involves titration of NaOH with Hydrochloric acid (HCL). Again, three reps of titration and a blank titration have to be completed. A volumetric pipet is used to measure 10.00mL of HCL into three labeled conical flasks. Then the flasks are filled with deionized water until about the 50mL mark. A buret is

Then he micro-centrifuge tube was placed into the water bath that was filled with 20°C water. 2 cm of the tube was sticking out of the top of the water bath. Then the oxygen sensor was placed, and tightly sealed into the test tubes opening. Then the walls of the water bath were completely covered with aluminum foil. This was to insure no light could reach the leaf.

Higher levels of solution should produce higher levels of product. The independent variable for the control group data and the experiment data is the yeast concentration. The dependent variable for the control group data and the experiment data is how much oxygen is produced. The Constant for the control group data and the experiment data is time and amount of hydrogen peroxide. The products of the experiment will increase if the levels of reactants increase. Denatured yeast may cause change in the reaction of the experiment. For all trials of the control group, the concentration of yeast is 6ml. For the experiment data, the yeast concentration varies from 8mL, 10 mL, 12 mL, 14 mL, and 16 mL. The temperature may cause change in the reaction of the combination of yeast and hydrogen peroxide

Group 1 received 107% for 0.0m, 109% for 0.25m, 112% for 0.5m, and 126% for 0.75m. Group 2 received 100% for 0.0m, 107% for 0.25m, 116% for 0.5m, and 117% for 0.75m. Group 3 received 100% for 0.0m, 106% for 0.25m, 114% for 0.5 m, and 117% for 0.75m. Group 4 received 100% for 0.0m, 106% for 0.25m, 113% for 0.5m, and 116% for 0.75m. Group 5 received 98% for 0.0m, 105% for 0.25m, 110% for 0.5m, and 115% for 0.75m. Group 6 received 104% for 0.0m, 108% for 0.25m, 111% for 0.5m, and 104% for 0.75m. The trend line that occurred for the rate of osmosis was an upward increase as the solute concentration increased.

Hypothesis: The yeast will have a greater rate of respiration for the natural sugars specifically the glucose and lower rate of respiration for the unnatural sugars

The Effect on the Rate of Respiration of Yeast Cells with Glucose when the Temperature is Varied

2. Following solutions are added to the tubes and the pH of each tube is determined: