Question

"The following are genotypes of merozygotes of E. coli with various combinations of lac operon mutations. Determine the phenotype with respect to beta-galactosidase (z), permease (y), and deacetylase (a) of each combination as U = uninducible, I = inducible, and C = constitutive. i- p+ o+ z+ y+ a-/i+ p+ oc z- y+ a+ "

Answer 1

Answer:

It will constitutively encode permease (y), and deacetylase (a)

and there is no production of beta-galactosidase (z)

Explanation:

As given;

Z translated into  beta-galactosidase;

y into permease;

And A into deacetylase;

and

U= uninducible,

I= inducible;

C= contitutive,

and  p= promoter, o= operator,  and etc

as here

merozygote  i- p+ o+ z+ y+ a-/i+ p+ oc z- y+ a+

it will constitutively encode for y+ and a+;  as the o⁽ is constitutive of i+ p+ oc z- y+ a+

and there is no synthesis from i- p+ o+ z+ y+ a- because  of i+ of i+ p+ oc z- y+ a+

z -

y +

a +

So it will constitutively encode permease (y), and deacetylase (a)

and there is no production of beta-galactosidase (z).