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Which gene is a useful selectable marker for E. coli?
AInsulin hormone gene
BCry toxin gene copy
CAmpicillin resistance
DGlobin protein gene
Answer & Solution
Correct answer: C. Ampicillin resistance
Genes for resistance to ampicillin, chloramphenicol, tetracycline or kanamycin are useful markers because normal E. coli lacks them.
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