The Following Are Two Genotypes of the Lactose Operon in E

question 139

Multiple Choice

The following are two genotypes of the lactose operon in E. coli:
1) I⁺ P^- O^c Z⁺ Y⁺
"2) I^- P⁺ O⁺ Z⁺ Y⁺
Do either of these genotypes produce -galactosidase and permease in the presence of lactose?"

• A)Both produce  -galactosidase and permease.
• B)Neither produces  -galactosidase and permease.
• C)The first one produces  -galactosidase and permease, the second does not.
• D)The first one does not produce  -galactosidase and permease, the second does.

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