What phenotype is exhibited by the trpR− strains?

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trpR strains synthesize tryptophan at 100% capacity in the absence of tryptophan, but only 1/3 of capacity (33%) when tryptophan is present.

trpR strains synthesize tryptophan at 33% capacity in the absence of tryptophan, but produce no tryptophan when tryptophan is present because repression is inhibited.

trpR strains are unable to synthesize tryptophan in either the presence or absence of tryptophan.

trpR strains synthesize tryptophan at 100% capacity in the absence of tryptophan, but transcription is absent when tryptophan is present.

 

asked Jun 3, 2013 in Genetics by GeneX ~Top Expert~ (7,947 points)
    

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trpR strains synthesize tryptophan at 100% capacity in the absence of tryptophan, but only 1/3 of capacity (33%) when tryptophan is present.

 

answered Jun 3, 2013 by GeneX ~Top Expert~ (7,947 points)

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