If a disinfectant kills 90% of a bacterial population in 1 minute, what is the minimum...
If a disinfectant kills 90% of a bacterial population
in 1 minute, what is the minimum time required to kill 100% of
10,000 cells in a solution
A. 3 minutes
B. 7 minutes
C. 5 minutes
D. 10 minutes
E. 2 minutes
Homework Answers
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If a disinfectant kills 90% of a bacterial population
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If 90% of a population of 100 cells is killed by a treatment in 1 minute....
If 90% of a population of 100 cells is killed by a treatment in 1 minute. How many cells are left after two minutes? 1 9 10 5 not enough information is given
1. The type of genetic exchange between bacterial cells that can happen between isolated DNA and...
1. The type of genetic exchange between bacterial cells that can happen between isolated DNA and a live bacterial cell is: a. conjugation b. transduction c. transversion d. transformation 2. An Hfr strain of E. coli with genotype a+b+c+d+e+f+ is mated with an F¯ auxotrophic strain with the genotype a¯b¯c¯d¯e¯f¯. Conjugation is stopped at 10 minute intervals and the genotypes of the resulting conjugants are determined. The following results are obtained: after 10 minutes e+ after 20 minutes a+ e+...
1. Fill in the table above with what you observe on your plates. 2. Bacterial transformation...
1. Fill in the table above with what you observe on your
plates.
2. Bacterial transformation occurred on which agar plate (s)?
What evidence do you have that the bacteria were transformed
here?
3. Which plates have glowing growth? Explain what causes
bacteria to glow.
II. Transformation of E. coli with Plasmid DNA (PGLO) 1. Three LB (Luria Broth) agar plates are obtained. The plates contain: • Plate A: LB-Agar/Ampicillin/Arabinose • Plate B: LB-Agar/Ampicillin • Plate C: LB-Agar 2. Three...
please help! Question 28 < > 0/1 pt 5 3 3 99 Details The doubling period...
please help!
Question 28 < > 0/1 pt 5 3 3 99 Details The doubling period of a bacterial population is 20 minutes. At time t = 90 minutes, the bacterial population was 60000. What was the initial population at time t = 0? Find the size of the bacterial population after 3 hours. Question Help: D Video Submit Question Question 29 ^ B0/1 pt 53 99 Details The half-life of Palladium-100 is 4 days. After 24 days a sample...
22. 24. 25. 27. Match LIST A with LIST B. (1 point each) When treatment is...
22. 24. 25. 27. Match LIST A with LIST B. (1 point each) When treatment is directed at living tissue 23. Gas used for sterilization Freeze-drying Common pasteurization protocol 26. the time in minutes) required to kill 90% of a bacterial population at a given temperature Lowest temperature at which all microbes in a liquid culture will be killed in 10 minutes Method of dry heat sterilization 29. Ionizing radiation The length of time required to kill all bacteria in...
What is the minimum sample size required to estimate a population mean with 90% confidence if...
What is the minimum sample size required to estimate a population mean with 90% confidence if the population standard deviation is estimated to be 30 and the desired margin of error is 2?
17. What sequence allows bacterial ribosomes to identify the CORRECT AUG start codon? A. Ori B....
17. What sequence allows bacterial ribosomes to identify the CORRECT AUG start codon? A. Ori B. -35 sequence C. TATA box D. poly(A) tail E. Shine-Dalgarno hat name is given to the region of RNA synthesis that contains the DNA, RNA, and RNA polymerase? A. transcriptosome B. transcription complex C. transcription bubble D. replicon E. transcription fork 19. What is the minimum length of time required for the synthesis by E. coli polymerase of an mRNA encoding a 100-kd protein?...
2. A 10-minute unit hydrograph (UH) of a catchment is given in the table below. What...
2. A 10-minute unit hydrograph (UH) of a catchment is given in the table below. What is the catchment area? (5 marks) Time step (10 minutes) 1 2 3 4 Discharge (mº/{s.cm)) 8 18 30 10 For a storm partern given in the table below, determine and plot runoff hydrograph at a 5-minute interval using the above 10-minute UH. Determine the time of concentration of the catchment. Assume the o index value for the catchment to be 12 mm/hr, and...
1. You have a bacterial cell culture with a concentration of 1x109 cells/ml. You need to...
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1. What is the significance of transcription and translation in overall physiology of Human or bacterial...
1. What is the significance of transcription and translation in overall physiology of Human or bacterial cells? 2. What is transcription? 3. What is translation? 4. What are the differences between Transcription and replication 5. What're the differences between the Transcription and Translation process in human cells versus bacterial cells? 6. What are the functions of RNA polymeraseI, Il and 1lI? 7. What is a promoter and what are the important sequences within a promoter? 8. What is the role...
1. Fill in the table above with what you observe on your
plates.
2. Bacterial transformation occurred on which agar plate (s)?
What evidence do you have that the bacteria were transformed
here?
3. Which plates have glowing growth? Explain what causes
bacteria to glow.
II. Transformation of E. coli with Plasmid DNA (PGLO) 1. Three LB (Luria Broth) agar plates are obtained. The plates contain: • Plate A: LB-Agar/Ampicillin/Arabinose • Plate B: LB-Agar/Ampicillin • Plate C: LB-Agar 2. Three...
please help!
Question 28 < > 0/1 pt 5 3 3 99 Details The doubling period of a bacterial population is 20 minutes. At time t = 90 minutes, the bacterial population was 60000. What was the initial population at time t = 0? Find the size of the bacterial population after 3 hours. Question Help: D Video Submit Question Question 29 ^ B0/1 pt 53 99 Details The half-life of Palladium-100 is 4 days. After 24 days a sample...
22. 24. 25. 27. Match LIST A with LIST B. (1 point each) When treatment is directed at living tissue 23. Gas used for sterilization Freeze-drying Common pasteurization protocol 26. the time in minutes) required to kill 90% of a bacterial population at a given temperature Lowest temperature at which all microbes in a liquid culture will be killed in 10 minutes Method of dry heat sterilization 29. Ionizing radiation The length of time required to kill all bacteria in...
2. A 10-minute unit hydrograph (UH) of a catchment is given in the table below. What is the catchment area? (5 marks) Time step (10 minutes) 1 2 3 4 Discharge (mº/{s.cm)) 8 18 30 10 For a storm partern given in the table below, determine and plot runoff hydrograph at a 5-minute interval using the above 10-minute UH. Determine the time of concentration of the catchment. Assume the o index value for the catchment to be 12 mm/hr, and...
1. What is the significance of transcription and translation in overall physiology of Human or bacterial cells? 2. What is transcription? 3. What is translation? 4. What are the differences between Transcription and replication 5. What're the differences between the Transcription and Translation process in human cells versus bacterial cells? 6. What are the functions of RNA polymeraseI, Il and 1lI? 7. What is a promoter and what are the important sequences within a promoter? 8. What is the role...
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