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Kaplan Qbank USMLE



Author8 Posts
  #1


Which of the following organisms is a natural transformer?

A. Escherichia coli

B. Neisseria gonorrhoeae

C. Plasmodium vivax

D. Pseudomonas aeruginosa

E. Staphylococcus aureus


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  #2

C?

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  #3

hmm.how do u define transformation?

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  #4

sorry malinda

I read about trnasformation somewhere but I forgot now.

But I only understand that transformation leads to modification of at least one of the characters of the recipient cells.

S. Pneumoniae is first reported about transformation.

Then HI, Bacillus Subtitis were reported.

Of above choices, it can be E. Coli or Plasmodium. If not Plamodium, it's E.Coli


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  #5

I actually never read this concept in any book ever.The explaination says transformation is the method by which a bacteria aquires a DNA from outside like plasmids.The bacteria that sow transformation are

1.streptococcus

2.neisseria

3.H influeza

4.H pylori

these 4 are NATURAL transformers.


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  #6

how about E.coli?

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  #7

its not in the list with me.My knowledge is restricted to this explaination only on this topic.I would love to know more from all of u guys..sad

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  #8

iam also very vague on this concept....but i found this website....picked up one point that the four listed above by MALINDA maybe naturally transformable bacteria. On the other hand E.coli undergoes induced-transformation....thus used with restriction endonucleases to clone human DNA and sequence it for the HGP....so on so forth...

http://www.bact.wisc.edu/Bact370/transform.html







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