Homework Answers
Ans.5.death phase consist of less cell division while in this phase death of cells occur more than new cells formation.
Ans.6.in log or exponential phase new cells division increses more and more while of cell death is very much low.
Ans.7 lag phase is metabolically active but no cell division occur in this phase .
Ans.11. More information needed
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In which phase of the Microbial Growth Curve is new cell division <cell death? Stationary Phase...
Question 1 "On a typical growth curve, which is/are logarithmic?" Olog and death lag and stationary...
Question 1 "On a typical growth curve, which is/are logarithmic?" Olog and death lag and stationary log lag death Question 2 Why is sugar added to fruit to make jams and jellies? to create a hypertonic environment to decrease osmotic pressure encourage osmolysis to create a halophilic envrionment it is a chemical requirement Question 3 1 points phase was observed for 25 minutes. Then logarithmic growth a slower rate was "A bacterium was incubated with aeration in a nutrient medium...
these are my results for my bacteria growth curve of e coli. expected results were to...
these are my results for my bacteria growth curve of e coli.
expected results were to have a lag phase, exponential phase,
stationary phase and death phase. the first phase is declining so
doesnt resemble a lag phase, and no death phase is present. please
explain why/ what are possible reasons in the difference in growth
curve vs what i expected
OD600 readings and cell concentration Cell Concentration (cell/mL) 1000000000 157000000 93700000 52700000 53000000 100000000 -30900000 10000000 21 SOXOXO Cell...
When measuring the growth curve of E. coli by spectrophotometer, the death phase is not normally...
When measuring the growth curve of E. coli by spectrophotometer, the death phase is not normally seen as a change in absorbance because a. the cells are dividing most rapidly at that stage b. the cells are still “gearing up” to start dividing before log phase c. the spectrophotometer inhibits the death phase, so cells stay in stationary phase d. dead cells absorb and diffuse light to nearly the same degree as live cells do e. live cells are black,...
this is a very tough homework assignment for my environmental biology course so if everyone could...
this is a very tough homework assignment for my environmental
biology course so if everyone could please help me I would greatly
appreciate it because I have no access to tutors to check my
work.
which of the following is correct about binary fission? A) It is a common type of microbial cell division. B) Daughter cells are identicals. C) It leads to a microbial population. D) All of the above To decide if you should replace the existing antibacterial...
3) Use the logarithmic phase of the growth curve to estimate the generation time (g units...
3) Use the logarithmic phase of the growth curve to estimate the generation time (g units are hours/generation; also known as the doubling time) of E. coli. How does the generation time that you estimated compare to the published generation times for E. coli growing under optimal conditions? What are some of the possible reasons for differences in the generation times? What are possible sources of error in this exercise? OD600 readings and cell concentration OD600 Readings Cell Concentration (cell/mL)...
11. Which of the following is most useful in representing population growth on a graph? a....
11. Which of the following is most useful in representing population growth on a graph? a. logarithmic reproduction of the growth curve b. a semilogarithmic graph using a log scale on the y-axis c. an arithmetic graph of the lag phase followed by a logarithmic section for the log, stationary, and death phases d. none of the above would best represent a population growth curve 12. Which of the following methods is best for counting fecal bacteria from a stream...
Define terms . Explain concept or process binary fission, generation, generation time, disinfection, antisepsis, sterilization, aseptic,...
Define terms . Explain concept or process binary fission, generation, generation time, disinfection, antisepsis, sterilization, aseptic, degerming, sanitization, pasteurization, non- ionizing and ionizing, surfactants, lag phase, exponential (log) phase, stationary phage, death phase, pyrimidines, antimicrobial, bacteriostatic, bactericidal, bacteriolytic, fastidious, mannitol salt agar, blood agar How to teichoic wall proteins, m-proteins and mycolic acids add to an organism virulence? (last week) • Describe binary fission Name where, and explain why, on the bacterial growth curve microbes are: Most virulent, most difficult...
Please ignore short answer and fill in the blank question. Matching (15 points) 15questions (only write...
Please ignore short answer and fill in the blank question.
Matching (15 points) 15questions (only write ONE letter that fits BEST) _1. FtsZ 2.MreB 3. Divisome 4. Chemostat 5.Batch culture 6. Alkaliphile 7. Acidophile 8. Obligate anaerobe 9. Facultative anaerobe 10. Microaerophile 11. Micronutrients 12. Macronutrients _13. Selective media _14. Defined media 15. Complex media Short answers (X points) A. determines shape of cell B. a protein which initiates cell division C. continuous culture D. complex of proteins that directs...
Question 1 "On a typical growth curve, which is/are logarithmic?" Olog and death lag and stationary log lag death Question 2 Why is sugar added to fruit to make jams and jellies? to create a hypertonic environment to decrease osmotic pressure encourage osmolysis to create a halophilic envrionment it is a chemical requirement Question 3 1 points phase was observed for 25 minutes. Then logarithmic growth a slower rate was "A bacterium was incubated with aeration in a nutrient medium...
these are my results for my bacteria growth curve of e coli.
expected results were to have a lag phase, exponential phase,
stationary phase and death phase. the first phase is declining so
doesnt resemble a lag phase, and no death phase is present. please
explain why/ what are possible reasons in the difference in growth
curve vs what i expected
OD600 readings and cell concentration Cell Concentration (cell/mL) 1000000000 157000000 93700000 52700000 53000000 100000000 -30900000 10000000 21 SOXOXO Cell...
this is a very tough homework assignment for my environmental
biology course so if everyone could please help me I would greatly
appreciate it because I have no access to tutors to check my
work.
which of the following is correct about binary fission? A) It is a common type of microbial cell division. B) Daughter cells are identicals. C) It leads to a microbial population. D) All of the above To decide if you should replace the existing antibacterial...
3) Use the logarithmic phase of the growth curve to estimate the generation time (g units are hours/generation; also known as the doubling time) of E. coli. How does the generation time that you estimated compare to the published generation times for E. coli growing under optimal conditions? What are some of the possible reasons for differences in the generation times? What are possible sources of error in this exercise? OD600 readings and cell concentration OD600 Readings Cell Concentration (cell/mL)...
11. Which of the following is most useful in representing population growth on a graph? a. logarithmic reproduction of the growth curve b. a semilogarithmic graph using a log scale on the y-axis c. an arithmetic graph of the lag phase followed by a logarithmic section for the log, stationary, and death phases d. none of the above would best represent a population growth curve 12. Which of the following methods is best for counting fecal bacteria from a stream...
Define terms . Explain concept or process binary fission, generation, generation time, disinfection, antisepsis, sterilization, aseptic, degerming, sanitization, pasteurization, non- ionizing and ionizing, surfactants, lag phase, exponential (log) phase, stationary phage, death phase, pyrimidines, antimicrobial, bacteriostatic, bactericidal, bacteriolytic, fastidious, mannitol salt agar, blood agar How to teichoic wall proteins, m-proteins and mycolic acids add to an organism virulence? (last week) • Describe binary fission Name where, and explain why, on the bacterial growth curve microbes are: Most virulent, most difficult...
Please ignore short answer and fill in the blank question.
Matching (15 points) 15questions (only write ONE letter that fits BEST) _1. FtsZ 2.MreB 3. Divisome 4. Chemostat 5.Batch culture 6. Alkaliphile 7. Acidophile 8. Obligate anaerobe 9. Facultative anaerobe 10. Microaerophile 11. Micronutrients 12. Macronutrients _13. Selective media _14. Defined media 15. Complex media Short answers (X points) A. determines shape of cell B. a protein which initiates cell division C. continuous culture D. complex of proteins that directs...
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