For this experiment my hypothesis was correct. The purpose of this experiment was achieved by observing and finding out the characteristics of each substance. The sugar turned brown and smelled good when heated, salt turned black and smelled like burnt rubber when heated, dirt turned to mud when water was added, and baking soda started to bubble when vinegar was added. According to table 1 the data shows that the unknown substance had similar characteristics to both sugar and dirt. And so to find out if my hypothesis was correct or not experiments were carried out based on tests that were characteristics of either sugar or dirt. One experiment was heating the unknown substance to check if it would start drying up and bubbling brown. The other was adding water to test if it would turn into mud. Some mistakes that could be improved in the experiment next time is- making sure not to pour a lot of salt into the beaker when heating it, since there was a lot of salt when heating it the smell was more nastier and shocking. Also when heating the dirt not to let it burn for a long time because when washing it, it was hard to get some of the dirt…
To conduct this experiment, we used 5 grams of sugar and 2 grams of yeast, but only used half of each for both experiments, so 2.5 grams of sugar and 1 gram of yeast for testing the effect of temperature and 2.5 grams of sugar and 1 gram of yeast for testing the effect of a disinfectant. We then mixed each beaker with 50 mL of water and stirred to fully dissolve the sugar and yeast. Then we used a 10 cc syringe and filled it up and put it in the fermentation tube and then added an additional 5 cc’s of the sugar/yeast solution to the tube. We then sealed the tube with a piece of parafilm and placed it into a water temperature of 10 degrees Celsius and recorded the time that we put them in. We then repeated that procedure but each time putting the tubes into 20, 30, 40, 50 and 60 degrees Celsius water. After 5-minute intervals, up to 20 minutes, we measured the amount of carbon dioxide formed in the fermentation tubes by using a ruler and measuring the amount of millimeters of carbon dioxide was produced. To test the variable of how a disinfectant affected the amount of fermentation, we repeated that procedure except instead of putting each fermentation tube into a certain temperature of water, we used the same temperature of water but each tube had a different amount of bleach in it. We put 0 drops of bleach in the first one and increased by 2 drops of bleach every tube, ending up with 10 drops in the sixth fermentation tube. We monitored the amount of…
The purpose of this lab is to answer the research question: “Does the concentration of sucrose affect the rate of cellular respiration in yeast?” What do you think?…
The aim of our investigation is to find out whether the use of different sugar isomers with yeast, will affect the rate at which the yeast respires at. The sugars to be tested are fructose, galactose, glucose, lactose and sucrose. Their effects on the respiration rate of yeast to be observed through the measurement (cm3) of the displaced water, which will tell us how much CO2 has been respired over 2 minutes. To compare the effects an average will be calculated for each and a result will be drawn from which we can draw a conclusion as to the effects, if any, of different isomers of sugar, on the respiration rate of yeast.…
Part B: To investigate whether yeast has the ability to ferment other sugars and artificial sweeteners and how lactase influences their ability to use lactose as a food source.…
One can predict that the tube with the highest concentration of yeast will produce the most carbon dioxide and will have the fastest rate of alcoholic fermentation. Results Two separate experiments were conducted to determine the effect of yeast concentration and pH level on the rate of fermentation. The first experiment involved the placement of different concentrations of yeast, glucose, and distilled water in four different tubes. Pipette pumps were placed on each tube to allow the solution to ferment, allowing carbon dioxide (CO2) bubbles. Results were collected and data was obtained (Table 1).…
Sugars are vital to all living organisms. The eukaryotic fungi, yeast, have the ability to use some, but not all sugars as a food source by metabolizing sugar in two ways, aerobically, with the aid of oxygen, or anaerobically, without oxygen. The decomposition reaction that takes place when yeast breaks down the hydrocarbon molecules is called cell respiration. As the aerobic respiration breaks down glucose to form viable ATP, oxygen gas is consumed and carbon dioxide is produced. This lab focuses on studying the rate of cellular respiration of saccharomyces cerevisiae, baker’s yeast, in an aerobic environment with glucose, sucrose, lactose, artificial sweetener, and water as a negative control. A CO2 Gas Sensor Probe is used to measure the amount carbon dioxide produced as the cellular respiration occurs which is proportional to how much of the molecule is decomposed. For this experiment water is used as a treatment control to provide a baseline for all the other treatments. To ensure the validity of the experiment, the amount of time the yeast was exposed to the sugars, the designated pipets for each sugar, the amount of sugar tested, and the temperature of the yeast culture were monitored to be the same throughout the experiment.…
In our positive control group, the rate of fermentation is the highest (Figure 2), and the sample solution (corn syrup, yeast, and calcium chloride) was used up before the cut-off time (45 minutes).…
The two types of fermentation that are well known are alcoholic fermentation as well as lactic acid fermentation. Fermentation is vital for many organisms, such as yeast and bacteria, because it allows them to obtain energy required to carry on life processes. Alcoholic fermentation is especially important for human beings, as it is used to produce alcoholic beverages, bread, and many other everyday items that are consumed (Alba-Lois, 2010). On the other hand, lactic acid is a waste product of certain bacteria (Lactobacillales), which is utilized to create many dairy products such as yogurt and cheese. In addition, humans can resort to lactic acid fermentation when oxygen is limited, so it is used as an extra source to obtain oxygen. In our experiment we will be using yeast, a single-celled organism that utilizes sugar as a food source, and it produces energy substances through the breakdown of sugar molecules. Specifically, the type of sugar as a source of food, impacts the speed of fermentation in yeast. In this lab, we will calculate the rate of fermentation in yeast with different solutions of sugar, such as sucrose, fructose, and lactose with glucose being the control. It is important to humans that the yeast uses the best sugar source during fermentation, as it creates important everyday items we consume like bread, alcohol, and…
The question being addressed in this lab is which ingredient will produce the most bubbles? If baking powder, baking soda, and salt are added to different test tubes of sugar water, then baking soda will have the most effect on the rate of fermentation (create the most bubbles). This hypothesis is rejected. Based off of data, the hypothesis was rejected. The ingredient that produced the most bubbles was baking powder. In the experiment finishing at 20 min., the control had 2.5 cm of bubbles produced, the salt produced 1.5 cm of bubbles, the baking soda produced 1.5 cm of bubbles, and finally the baking powder produced 6 cm of bubbles. This then shows that based off of the results from the experiment, baking powder produced the most amount of…
In the future, we can do this experiment more effectively by having more than three weeks to perform the experiment as well as letting the yeast grow for more than twenty-four hours. As a result of having a longer amount of time to do the study and letting the yeast grow for longer than twenty four hours, we would get better results; yeast multiplies and divides rapidly in a short period of time so having it do that for a long time would probably allow the yeast to increase its cell growth more. The significance of this experiment was that yeast is a model organism and it is found in both bread and beer. It is a universal organism…
Factors that affect the rate of fermentation are the nutrient availability and the concentration of that nutrient. In the Barfing Bag experiment, our control group which was granulated sugar worked the best against splenda, artificial, and stevia which a sugar substitute that comes from a plant and has 0 calories. In the barfing bag experiment we had three bags with yeast and then we added different types of sugars to test which type of sugar creates the most carbon dioxide or which bag inflates the most. The bag that inflated the most with carbon dioxide was our control group which is the granulated sugar. . It inflated about 3 cm in 20 minutes with our control group sugar while splenda only inflated 2.1cm, and stevie 2.4cm.…
The results of the labs were meant to measure the CO₂ released into the air by fermentation. The experiment was initiated to determine whether gelatin affects the process of fermentation. How does gelatin affect the process of fermentation? If you add more gelatin into the mixture of water and yeast, the…
In this experiment yeast ferment sugars anaerobically. When yeast ferments the sugars anaerobically, however, CO2 production will cause a change in the weight of the sugar/yeast-solution. This raises a further question: What is the effect of different kinds of sugars on the fermentation process of yeast? The fermentation process was followed at a constant temperature and four different types of sugars were used. By measuring the release of carbon dioxide, we could see what type of sugar had the biggest effect on the fermentation process of yeast, which resulted in Sacharose.…
• [Brady Burkhart, Terrell Grayson and Eric Kimler, 2009. Yeast Fermentation Optimization Project#4 [pdf]. 17th September 2009. Available at http://unitopslab.okstate.edu/yeast%20fall%202%2009.pdf [accessed 15:08, 11.11.2012]]…