Homework Answers
The composition of membrane lipids become more unsaturated to support homeoviscosity.
this shift would hav reduced the concentration of cholesterol to maintain fluidity
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Membrane's regulation Problem 4 (20 pts) - A culture of bacteria growing at 37°C was shifted...
If you were growing a culture of bacteria at 37°C and decreased the temperature of your...
If you were growing a culture of bacteria at 37°C and decreased the temperature of your culture to 15°C, what would be the etfect of this change on the activity of the enzyme desaturase? How would this change in desaturase activity affect the fatty acid composbion and transition temperature of the membrane? (0.4 points) 1 Answer
If you were growing a culture of bacteria at 37°C and decreased the temperature of your culture to 15°C, what would be the etfect...
Which of the following processes will most likely occur when you transfer a bacterial culture from...
Which of the following processes will most likely occur when you transfer a bacterial culture from 37 degree C to 10 degree C? the bacteria will start synthesizing cholesterol the bacteria will remove cholesterol from their membranes the bacteria will reduce the number of unsaturated bonds in the fatty acid tails of their phospholipids the bacteria will increase the synthesis of phospholipids with very long fatty acid tails and insert these into their membranes the bacteria will increase the synthesis...
Biochemistry: Membranes/metabolism 4. (6 pts) Membrane composition E. coli bacteria can be cultured at different temperatures....
Biochemistry: Membranes/metabolism
4. (6 pts) Membrane composition E. coli bacteria can be cultured at different temperatures. How does the fatty acid composition in membranes of E. coli grown at 20 °C compare with the composition in membranes of bacteria grown at 37 °C? Explain.
2a. (4 pts) A potent mutagen was added to an E. coli culture growing in rich...
2a. (4 pts) A potent mutagen was added to an E. coli culture growing in rich broth. Prior experiments established that this F cell line, designated WWU113, could not synthesize leucine. You are interested in measuring the rate of induced reverse mutation. You plan to grow a liquid culture of the leu strain and then plate various dilutions of the culture onto selective media. What media should you use to grow up the liquid culture? This will be Media A...
7. (7 pts) The number N() of bacteria in a culture is growing exponentially. When t=0...
7. (7 pts) The number N() of bacteria in a culture is growing exponentially. When t=0 hours, Nt) = 5000 bacteria, and when 1 = 5 hours, N(O) = 30,000 bacteria. W a. Find the growth rate k. (Round to four decimal places.) In solamyes Isinoshorts non 11001nix on bald #7a: b. Write the function () that represents the number of bacteria after hours. #7b: c. After how many hours will the number of bacteria be 100,000? Round to the...
1) Acetic acid is produced using bacteria in batch culture. It was shown that for each mole of gl...
1) Acetic acid is produced using bacteria in batch culture. It was shown that for each mole of glucose utilized by the bacteria, 3.60 moles of cells, 1.10 moles of acetic acid, 1.30 moles of gaseous CO2, and some H20 are formed. Oxygen and ammonia were consumed. Other components of the system such as phosphate can be neglected. Cellular composition of bacteria might be taken as CH1.770049No.24 Medium containing glucose and ammonia dissolved in 15,000 litres of water is pumped...
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon?...
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon? CAMP is a repressor of the lactose operon and turns off gene expression of the lactose operon CAMP is an activator and prevents the repressor protein from binding to the operator region of the operon which allows for the lactose operon to be turned "on". 5 CAMP is an inducer of the lactose operon and also an activator since it prevents the repressor protein...
here would you expect to find a bedrophhobic amino acld like valine? hor of the folded...
here would you expect to find a bedrophhobic amino acld like valine? hor of the folded protein, away from water on the exterior surface of the protein, interacting with water C) in the interior of the folded protein, away from water, or in a tranomembrane portion interacting with lipid fatty acid chains D) in the transmembrane portion interacting with lipid fatty acid chains- 20) Which of the following are found in plant, animal, and bacterial cells? A) chloroplasts C) ribosomes...
all please Lecture exercise 1 & laboratory exercises (1 pt. cach, 40 pts. total) 31. What...
all please
Lecture exercise 1 & laboratory exercises (1 pt. cach, 40 pts. total) 31. What was the question that Fleming asked in the case study? a. Why were there clear areas around the mold? c. Can bacteria grow rapidly on agar plates? b. Do molds produce a chemical tha us produce a chemical that kills bacteria? De hacteria produce a chemical that kills molds? e not having a control, Fleming was able to support his hypothesis because of which...
1. Like phospholipids, lipopolysaccharides have a hydrophilic head and a hydrophobic tail. True or false 2....
1. Like phospholipids, lipopolysaccharides have a hydrophilic head and a hydrophobic tail. True or false 2. The outer membrane of Gram negative bacteria contains lipopolysaccharides T or F 3. Biofilms and pure culture are formed by only one type of microorganism T or F 4. Any given antibiotic will have the same minimum inhibitory concentration (MIC) against any test microorganism. T or F 5. Production of antibiotics by the microorganism is not affected by the culture conditions T or F...
If you were growing a culture of bacteria at 37°C and decreased the temperature of your culture to 15°C, what would be the etfect of this change on the activity of the enzyme desaturase? How would this change in desaturase activity affect the fatty acid composbion and transition temperature of the membrane? (0.4 points) 1 Answer
If you were growing a culture of bacteria at 37°C and decreased the temperature of your culture to 15°C, what would be the etfect...
Biochemistry: Membranes/metabolism
4. (6 pts) Membrane composition E. coli bacteria can be cultured at different temperatures. How does the fatty acid composition in membranes of E. coli grown at 20 °C compare with the composition in membranes of bacteria grown at 37 °C? Explain.
2a. (4 pts) A potent mutagen was added to an E. coli culture growing in rich broth. Prior experiments established that this F cell line, designated WWU113, could not synthesize leucine. You are interested in measuring the rate of induced reverse mutation. You plan to grow a liquid culture of the leu strain and then plate various dilutions of the culture onto selective media. What media should you use to grow up the liquid culture? This will be Media A...
7. (7 pts) The number N() of bacteria in a culture is growing exponentially. When t=0 hours, Nt) = 5000 bacteria, and when 1 = 5 hours, N(O) = 30,000 bacteria. W a. Find the growth rate k. (Round to four decimal places.) In solamyes Isinoshorts non 11001nix on bald #7a: b. Write the function () that represents the number of bacteria after hours. #7b: c. After how many hours will the number of bacteria be 100,000? Round to the...
1) Acetic acid is produced using bacteria in batch culture. It was shown that for each mole of glucose utilized by the bacteria, 3.60 moles of cells, 1.10 moles of acetic acid, 1.30 moles of gaseous CO2, and some H20 are formed. Oxygen and ammonia were consumed. Other components of the system such as phosphate can be neglected. Cellular composition of bacteria might be taken as CH1.770049No.24 Medium containing glucose and ammonia dissolved in 15,000 litres of water is pumped...
Question 12 2 pts What is the role of CAMP in regulation of the lactose operon? CAMP is a repressor of the lactose operon and turns off gene expression of the lactose operon CAMP is an activator and prevents the repressor protein from binding to the operator region of the operon which allows for the lactose operon to be turned "on". 5 CAMP is an inducer of the lactose operon and also an activator since it prevents the repressor protein...
here would you expect to find a bedrophhobic amino acld like valine? hor of the folded protein, away from water on the exterior surface of the protein, interacting with water C) in the interior of the folded protein, away from water, or in a tranomembrane portion interacting with lipid fatty acid chains D) in the transmembrane portion interacting with lipid fatty acid chains- 20) Which of the following are found in plant, animal, and bacterial cells? A) chloroplasts C) ribosomes...
all please
Lecture exercise 1 & laboratory exercises (1 pt. cach, 40 pts. total) 31. What was the question that Fleming asked in the case study? a. Why were there clear areas around the mold? c. Can bacteria grow rapidly on agar plates? b. Do molds produce a chemical tha us produce a chemical that kills bacteria? De hacteria produce a chemical that kills molds? e not having a control, Fleming was able to support his hypothesis because of which...
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