Part F For this genotype, indicate whether the enzyme is indicated is produced a

Question

Part F For this genotype, indicate whether the enzyme is indicated is produced at significant levels. 1 B-galactosidase, no lactose present 2 B-galactosidase, lactose present as sole carbon source 3 permease, no lactose present 4 permease, lactose present as sole carbon source To enter your answer list only the numbers of the situations that would produce the enzyme at significant levels. Write them in numerical order without spaces or any other characters. If none of the situations would produce significant enzyme production, write a single 0. For example: 124

Explanation / Answer

Oc constitutive will always be active operator and is unable to bind repressor and operator is cis acting. Thus, Y+ under its control will always make permease enzyme regardless of lactose presence. thus, 34

and Z+ for galactosidase enzyme will make the enzyme only when lactose is presen and will convert to allolactose and thus inhibit repressor from binding to O+ operator. Thus, galactosidase will be made only when lactose is present. 2.

total correct options are 234.

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