MICROBIOLOGY: Why is glycerol yeast extract used to select for anti-biotic producing bacteria? What are the...
MICROBIOLOGY: Why is glycerol yeast extract used to select for anti-biotic producing bacteria? What are the properties of the medium that makes it ideal for anti-biotic producing bacteria?
Homework Answers
Glycerol will be utilized by the glycerol-utilizing microorganisms like actinomycetes, which are the main organisms to produce antibiotics. Antibiotics are secondary metabolites which are produced during the stationary phase of growth curve. The glycerol is the carbon source and will promote slow growth of microbes and helps in the accumulation of secondary metabolites. Yeast extract act as a good nitrogen source for antibiotic production.
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MICROBIOLOGY: Why is glycerol yeast extract used to select for
anti-biotic producing bacteria? What are the...
In a "pulse chase" experiment under anaerobic conditions, 14C glucose is added to an ethanol-producing yeast...
In a "pulse chase" experiment under anaerobic conditions, 14C glucose is added to an ethanol-producing yeast cell extract just long enough that each intermediate in the ethanol fermentation is labeled with a 14C (pulse). The 14C label is then diluted so that no additional radioactivity is incorporated into the intermediates (chase). 1. What position in ethanol will be labeled with 14C if 14C-glucose labeled at position C-1 is used? 2. Where should the 14C label sit in glucose for it...
Chapter 4(microbiology) 1. What are the shapes and arrangements of bacteria cells? 2. Why is it...
Chapter 4(microbiology) 1. What are the shapes and arrangements of bacteria cells? 2. Why is it important to be able to identify the shape and arrangement of an unknown bacterial sample? 3. Differentiate between eubacteria and archaebacteria. 4. What are the differences between eukaryotes and prokaryotes? 5. Why would a microbiologist care about those differences? Be specific. 6. What are the basic parts of a prokaryote? (the parts found in all bacteria) 7. How do the cell walls of Gram...
Why is Agrobacterium tumefaciens used to make transgenic plants? What is unique about this bacteria?
Why is Agrobacterium tumefaciens used to make transgenic plants? What is unique about this bacteria?
Why is ethylene oxide used instead of water(steam) for steralization of medical equipment. What physical properties...
Why is ethylene oxide used instead of water(steam) for steralization of medical equipment. What physical properties makes the molecule better? what makes it worse? (if needed use pictures)
2. What is the enzyme being tested? 3. What is the substrate if the enzyme? 4....
2. What is the enzyme being tested? 3. What is the substrate if the enzyme? 4. For what purpose do bacteria that have the enzyme utilize it? 6. What will occur if the plate is incubated right side up? 7. What will occur if the plate is incubated for more than 24-48 hours? Exercise 7: Selective and Differential Growth Medium and Tests 95 Exercise 7.9 Hydrolytic Exoenzymes: Lipase and Casease LIPASE TEST Lipids are fatty acids used by some bacterium...
Microbiology ONLY answer 1 2 3 4 5 6 7 8 9 10 11 12 13...
Microbiology
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Salmonella is associated with the handling of contaminated beef True False Escherichia coli is a red-pigmented organism. True O False The results of the MR-VP test can be directly read from the test without the addition of any other chemicals. True False Which medium contains a pH indicator to show pH change caused by fermentation? Glucose Broth Lactose Broth SIM Lactose and...
Lab Report-Carbohydrates 1. Purpose 2. Special Media for Isolating Bacteria (Lab #12) a. Why are dyes...
Lab Report-Carbohydrates 1. Purpose 2. Special Media for Isolating Bacteria (Lab #12) a. Why are dyes such as phenol red, eosin or methylene blue added to the media? b. How does the bacterium change the media (i.e color of agar or colonies) after incubation? C. In this experiment, which media are selective, and which are differential? d. How did the results observe on the mannitol salt agar and EMB agar correlate to the Gram reaction of the bacteria? e. What...
What instrument is used for food canning? Question 1 Not yet answered Select one: O a....
What instrument is used for food canning? Question 1 Not yet answered Select one: O a. autoclave Points out of 1.00 b. oven P Flag question c. regenerator d. steamer Question 4 When performing a gram stain, what is the purpose of heating the slide once the bacteria have been added? Not yet answered Points out of 1.00 Flag question Select one: a. kill the balleria b. attach the bacteria to the slide c. increase the permeability of the bacteria...
Question 18 When attempting to isolate a gene of interest, what is most commonly the first...
Question 18 When attempting to isolate a gene of interest, what is most commonly the first step? Not yet answered Points out of 1.00 Select one: a. gel electrophoresis b. enzyme digestion P Flag question c. DNA extraction d. protein purification e. PCR Question 19 What must a growth media contain? Not yet answered Points out of 1.00 Flag question Select one: a. a carbon source, such as glucose. b. sources of carbon, nitrogen, phosphorus, and various trace metals c....
microbiology help TOT Zoo Add Page Insert Table Chart Text Shape Media Comment These questions will...
microbiology help
TOT Zoo Add Page Insert Table Chart Text Shape Media Comment These questions will serve in lieu of a lab report for Exercise 15, 16, and 17 You will find the answer to these questions in the background, procedure, results and interpretation sections of manual Exercise 15, 16, and 17, videos, Actions of Selective and Differential Media Chart, and the Principle/Theory article in homework section.) General Questions 1. What is the purpose (function) of selective media? (How does...
2. What is the enzyme being tested? 3. What is the substrate if the enzyme? 4. For what purpose do bacteria that have the enzyme utilize it? 6. What will occur if the plate is incubated right side up? 7. What will occur if the plate is incubated for more than 24-48 hours? Exercise 7: Selective and Differential Growth Medium and Tests 95 Exercise 7.9 Hydrolytic Exoenzymes: Lipase and Casease LIPASE TEST Lipids are fatty acids used by some bacterium...
Microbiology
ONLY answer
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Salmonella is associated with the handling of contaminated beef True False Escherichia coli is a red-pigmented organism. True O False The results of the MR-VP test can be directly read from the test without the addition of any other chemicals. True False Which medium contains a pH indicator to show pH change caused by fermentation? Glucose Broth Lactose Broth SIM Lactose and...
Lab Report-Carbohydrates 1. Purpose 2. Special Media for Isolating Bacteria (Lab #12) a. Why are dyes such as phenol red, eosin or methylene blue added to the media? b. How does the bacterium change the media (i.e color of agar or colonies) after incubation? C. In this experiment, which media are selective, and which are differential? d. How did the results observe on the mannitol salt agar and EMB agar correlate to the Gram reaction of the bacteria? e. What...
What instrument is used for food canning? Question 1 Not yet answered Select one: O a. autoclave Points out of 1.00 b. oven P Flag question c. regenerator d. steamer Question 4 When performing a gram stain, what is the purpose of heating the slide once the bacteria have been added? Not yet answered Points out of 1.00 Flag question Select one: a. kill the balleria b. attach the bacteria to the slide c. increase the permeability of the bacteria...
Question 18 When attempting to isolate a gene of interest, what is most commonly the first step? Not yet answered Points out of 1.00 Select one: a. gel electrophoresis b. enzyme digestion P Flag question c. DNA extraction d. protein purification e. PCR Question 19 What must a growth media contain? Not yet answered Points out of 1.00 Flag question Select one: a. a carbon source, such as glucose. b. sources of carbon, nitrogen, phosphorus, and various trace metals c....
microbiology help
TOT Zoo Add Page Insert Table Chart Text Shape Media Comment These questions will serve in lieu of a lab report for Exercise 15, 16, and 17 You will find the answer to these questions in the background, procedure, results and interpretation sections of manual Exercise 15, 16, and 17, videos, Actions of Selective and Differential Media Chart, and the Principle/Theory article in homework section.) General Questions 1. What is the purpose (function) of selective media? (How does...
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