Which genotype will allow the bacteria to make galactosidase(lacZ) in...

Which genotype will allow the bacteria to make ÃŸ-galactosidase (lacZ) in the absence of lactose? (superscripts...

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Biology

Which genotype will allow the bacteria to make ÃŸ-galactosidase(lacZ) in the absence of lactose? (superscripts don't work in thispanopto quiz, so check the lecture slide itself)
1) O+Z+/Fâ€™O+Z+
2) O+Z-/Fâ€™OCZ+
3) O+Z+/Fâ€™OCZ-
B) 1Which genotype will allow the bacteria to makeÃŸ-galactosidase (lacZ) in the absence of lactose?
1) I+O+Z+/Fâ€™I+O+Z+
2)I-O+Z-/Fâ€™I+O+Z+
3) I+O+Z-/Fâ€™I-O+Z+
4) I-O+Z+/Fâ€™I-O+Z+

Answer & Explanation Solved by verified expert

3.6 Ratings (350 Votes)

Operon can be defined as a group or cluster of genes which are functionally related that have a common operator Thus the lac operon is a group of three genes lacZ lacY and lacA that are involved in the metabolism of lactose and are controlled by a common operator The lac operon is an inducible operon which means that generally the operon is in a repressed state or inactive but in the presence of the inducer allolactose lactose is rearranged inside the cell to its isomer form allolactose the operon is activated The lac operon consists of a promoter site where the RNA polymerase binds It consists of an operator site where the lac repressor is generally bound Generally when the lac repressor is bound to the operator region the RNA polymerase cannot bind to the promoter region and start See Answer

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