Microbiology Answers

How do bacteria survive under conditions of starvation?

How does a capsule protect a bacterial cell

essay Provide evidence to substantiate the hypothesis that eukaryotic cells evolved from prokaryotic cells

Bacterial generation times were calculated in the media shown below.
All media were prepared with tap water and incubated aerobically in the light.



Generation times(min.)
Medium Escherichia coli Pseudomonas
aeruginosa Lactobacillus Nitrobacter
0 0 0 80
Glucose 100 0 0 0
Glucose, 82 0 0 0
Glucose, , 56 200 0 0
Glucose, ,
43 100 0 0
Glucose, , ,
, 8 amino acids 28 40 0 0
Glucose, , ,
, 19 amino acids 25 25 80 0



Compare and contrast the growth requirements of the bacteria listed in the table. Which of the media, if any, are chemically defined?
Essay answers are limited to about 500 words (3800 characters maximum, including spaces).

a certain disease haa a mortality rate of 75%. Two patients suffering from the disease are selected at random. What is the probability that at least one of them will recover?

post streptococcal infection

In the nitrogen cycle, nitrogen fixation is primarily carried out by?
A. bacteria
B. humans
C. plants
D. ammonia

How could you interrupt bacterial translation without affecting human cell translation?