For the following genotypes of E. coli strains, state whether enzyme activity is inducible (I), constitutive (C), or uninducible (U). Key to symbols in table: z = structural gene for  -galactosidase y = structural gene for permease a = structural gene for transacetylase p = promoter (for lac operon) i = structural gene for the lac repressor (regulator gene) o = operator (binding site for repressor) Genotype  -gal (z) Permease (y) Transacetylase (a) i+ p+ oC z- y- a+ i- p+ o+ z+ y- a- / i+ p- oc z- y+ a- i- p+ o+ z+ y- a+ / i+ p+ oc z- y+ a- i+ p+ o+ z- y- a+ i- p- o+ z+ y- a+ / i- p+ o+ z- y+ a- iS p+ o+ z- y- a+ i- p+ o+ z+ y- a+ / i+ p- oc z- y+ a- is p+ o+ z- y+ a+ / i+ p+ oc z+ y- a- i- p- o+ z+ y- a+ / i- p+ o+ z- y- a- is p+ oc z+ y- a+ i+ p+ oc z+ y- a+

For the following genotypes of E. coli strains, state whether enzyme activity is inducible (I), constitutive (C), or uninducible (U). Key to symbols in table: z = structural gene for  -galactosidase y = structural gene for permease a = structural gene for transacetylase p = promoter (for lac operon) i = structural gene for the lac repressor (regulator gene) o = operator (binding site for repressor) Genotype  -gal (z) Permease (y) Transacetylase (a) i+ p+ oC z- y- a+ i- p+ o+ z+ y- a- / i+ p- oc z- y+ a- i- p+ o+ z+ y- a+ / i+ p+ oc z- y+ a- i+ p+ o+ z- y- a+ i- p- o+ z+ y- a+ / i- p+ o+ z- y+ a- iS p+ o+ z- y- a+ i- p+ o+ z+ y- a+ / i+ p- oc z- y+ a- is p+ o+ z- y+ a+ / i+ p+ oc z+ y- a- i- p- o+ z+ y- a+ / i- p+ o+ z- y- a- is p+ oc z+ y- a+ i+ p+ oc z+ y- a+