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8_murik_8 [283]
1 year ago
12

Mention the name of four groups of important pathogenic E. coli? Can TBX medium be used to recover all types of nonpathogenic an

d pathogenic E. coli? Support your answer by giving an example.
Biology
1 answer:
Law Incorporation [45]1 year ago
5 0

The four groups of pathogenic E.coli are enteropathogenic, enterotoxigenic, verocytotoxigenic and enteroinvasive groups. These groups can best be isolated and recoved through luria broth.

<h3>What is Escherichia coli?</h3>

The pathogenic E. coli or Escherichia coli serotypes are grouped on the basis of their mechanism of causing symptoms in humans. The six groups of pathogenic E.coli are enteropathogenic, enterotoxigenic, verocytotoxigenic, enteroinvasive, enteroaggregative and diffusely adherent E. coli.

Luria broth (LB) is one of the most commonly used growth medium for E. coli. It promotes fast growth of the organism and also provides good plasmid yields, making it an excellent choice for most laboratory applications, especially the small-scale plasmid preps.

Learn more about E.coli here:

brainly.com/question/13553402

#SPJ1

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A paleontologist has recovered a bit of tissue from the 400-year-old preserved skin of an extinct dodo bird. The researcher woul
slava [35]

Answer:

c)polymerase chain reaction (PCR).

Explanation:

Because the paleontologist recovered only a bit of tissue  and it is very old, it is very likely that the DNA in the sample is very small and part of it is degraded. Anyway, the paleontologist must first amplify the DNA sample to obtain many identical copies of the specific region of the DNA they want to compare. the above is done through a polymerase chain reaction (PCR).

8 0
4 years ago
1. Suppose the synthesis of an amino acid was accomplished by four enzymes encoded by four genes that formed an operon. Draw a m
vivado [14]

I have attached lac operon model having 4 genes. See attachment for better understanding.

Answer:

The Lac operon is controlled  by two signals.

Initiation

Glucose and lactose  concentrations control the initiation of  transcription of the Lac operon through  their effects on the Lac repressor protein  and Cap.

Lactose absent (Repression)

When lactose is absent, the Lac  repressor binds the Lac operator and shuts  off expression of the operon.

Lactose present (Transcription)

Addition  of lactose increases the intracellular  concentration of a related compound,  allolactose. allolactose binds to the  Lac repressor, causing it to undergo a  conformational change that releases its grip  on the operator DNa.

Glucose absent (Repression)

When  glucose is absent, cyclic aMp (red triangle)  is produced by the cell and Cap binds to  DNA.

Glucose present (Transcription)

LacZ, the first gene of the operon,  encodes the enzyme b-galactosidase, which  breaks down lactose to galactose and  glucose.

7 0
3 years ago
Where is the carbon taken in by plants during photosynthesis stored
Irina18 [472]

Answer:

Leaves, stem, and roots

6 0
3 years ago
How does the body plan and anatomy enable the monarch butterfly to perform the essential functions it needs to survive?
likoan [24]

Answer:

wouldn't it be instincts or are you looking for more specific answers

Explanation:

3 0
3 years ago
Plz help :(
AlekseyPX

Answer:

Brahmanism.

-ilovejiminssi

8 0
3 years ago
Read 2 more answers
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