Author Question: The table below lists several genotypes associated with the lac operon in E. coli. For each, ... (Read 95 times)

kellyjaisingh · **on:** Mar 26, 2020

The table below lists several genotypes associated with the lac operon in E. coli. For each, indicate with a "+" or a "-" whether functional β-galactosidase would be expected to be produced at induced levels.

β-Galactosidase Production

Genotype

No Lactose

With Lactose

(a) I + O+ Z+/F' I - O+ Z+
(b) I - Oc Z+/F' I - O+ Z-
(c) I s Oc Z+/F' I + O+ Z+
(d) I - O+ Z+/F' I - O+ Z+

I +	= wild-type repressor

I -	= mutant repressor (unable to bind to the operator)

I s	= mutant repressor (insensitive to lactose)

O+	= wild-type operator

Oc	= constitutive operator (insensitive to repressor)

pikon · **Reply #1 on:** Mar 26, 2020

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