Describe the E. coli culture contamination ?
Answer / priya
1.Culturing in the medium no 4 -endo
2.By microscoping - visible Lac "+"
3.Isolating them in the medium no 1 .
4.checking for biochemical activity
-medium with citrate, medium no 14 (should not be fermented)
-culturing in medium no 15 (formation of indol) indol "+"
-Cyt-oxidase "-"
- the sample contains Gr "-" bacteria, negative results in
oxidase, indol and does not utilise citrate.
-Conclusion contamination E-coli
| Is This Answer Correct ? | 0 Yes | 1 No |
Explain the difference between xylem and phloem?
Where form do the non-green plants get their food ?
What is a graduated cylinder and how is it used?
What is the function of a control group in an experiment?
Explain the Gas chromatography ?
how does plant depends on animal? how does animal depends on plant? give an example of each of the following a)climber b)shrub c)herb?
How much salt is in the human body?
What is the difference between nematocyst and spicules?
Give an example of a parasite relationship?
Explain the purpose of dna?
Explain why do leaves change color?
What is an organ that belongs to more than one organ system?