Question about strains of e. coli

Reference no: EM1389815

Question: Note whether in the following strains of E. coli, B-galactosidase will be: (A) Absent in both the presence and absence of lactose; (B) Abundant only in the absence of lactose; (C) Abundant only in the presence of lactose; (D) Abundant in both the presence and absence of lactose; or (E) Abundant only in the presence of tryptophan.
I. i(-); II. i(s) / i(-); III. i(-)p(-) / i(+)p(+); IV. i(-)p(+)o(c) / i(s)p(-)o(+).

Reference no: EM1389815

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