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wishikhan Forum Newbie Topics: 93 Posts: 278	Mar 29, 2009 - 12:20 PM       #1 E colic strains x and y are both resistant to ampicillin. ampicillin resistance is stable in strain x when it is grown for multiple generations in the absence of the antibiotic .however strain y loses ampicillin resistance when it is grown in media without the antibiotic .whic of the following best explains the acquistion of AMPICILIlin dudceptibility in strain y? A DOWN REQULATION OF THE RESISTANCE GENE b INSERTION OF ATRANSPOSON INTO THE RESISTANCE GENE C LOSS OF A PLASMIND CARRYING THE RESISTANCE GENE D POINT MUTATION IN THE RESISTANC GENE E RECOMBINATION WITH A DEFECTIVE COPY OF THE RESISTANCE GENE
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cirus Forum Guru Topics: 99 Posts: 736	Apr 24, 2009 - 9:57 AM       #2 A
sumeetmultani Forum Elite Topics: 47 Posts: 340	Apr 24, 2009 - 10:08 AM       #3 D
jorgefhoyos Forum Junior Topics: 1 Posts: 86	Apr 26, 2009 - 1:51 AM       #4 A?
sumeetmultani Forum Elite Topics: 47 Posts: 340	Apr 26, 2009 - 2:34 AM       #5 answer is based on most common mechanism of sudden loss of resistance. either its point mutation --D or loss of plasmid -c plzz..give the answer wishikhan

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