in the fermentation by yeast experiment, if you observed respiration, identify the gas that was produced. Suggest two methods could used for positively identifying the gas
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in the fermentation by yeast experiment, if you observed respiration, identify the gas that was produced. Suggest two methods could used for positively identifying the gas
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How much water, yeast, glucose, and flour is used in the experiment
- During fermentation, bubbles can be seen emerging from the glass tubing. Identify the gas causing the bubbles.Create a dilution series to accurately count CFU from a plate, it is assumed that the targest yeast is 3x10^6 CFU/mL. The fermentation is also 500L Identify the sample volume harvested, and state what dilution series was used (2x, 5x or 10x). What was the expected CFU count?.Describe a simple experiment to demonstrate anaerobic respiration in yeast.
- Why is the sterile technique (the flame sterilization of wire loop) followed during the fermentation lab simulation? A. To ensure mono cultivation of yeast cells. B. To ensure optimal pH for the yeast cells to grow. C. To remove unwanted compounds, such as ammonia, in the medium. D. To remove oxygen and maintain anaerobic conditions.Was there any difference in the amount of gas produced by yeast in room temperature tapwater compared with yeast in tapwater at 35-40 degrees Centigrade? Explain why this might be so.Which test tube shows the most fermentation?
- In this lab, we used three different bacteria (E.Coli, B. Subtilis, and A. Faecalis) in fermentation assays to determine their ability to ferment three different carbohydrates: lactose, glucose and sucrose. In the table below record the results of the experiment using "P" for positive and "N" for negative results.What tests would you use to determine if an organism was fermentation positive or negative? Include in your answer the indicator you would use. In addition to carbohydrate, what other major organic material, present in the medium, could be broken down to produce energy and what would be the final color change be used when it is broken down?. Also indicate the three possible color changes of the indicator used and the three pH levels at which the medium changes color. Explain the purpose of the Durham or fermentation tube in the test tube and why it is upside down? What gas is produced in fermentation of glucose? The purpose of the fermentation tests are to determine members of what family from other gram negative organisms? Name a genera of Gram positive cocci from a genera of Gram positive cocci which is a non-fermenter.what molecule is split in the fermentation reaction that produces carbon dioxide?
- Student V and student W wanted to do metabolism experiments with student V doing a fermentation experiment and student W doing an aerobic respiration experiment. Student W used 6 test tubes with balloons tied to the top of each test tube, but in each test tube student W put germinated beans. Student W used the same temperatures as student V. After 45 minutes, student W noted that there was no inflation of any balloon. Why did this happen?proposed fermentation experimentWhat causes the suction on your thumb after the NaOH was added to the contents of the fermentation tube? Write two balanced chemical equations to support your answer describing the reactions that occur between the entrapped gas and NaOH.