Choose the correct answer from the list below. Not all of the answers will be used.
-The xpression of galactosidase requires the induction of an operon by removal of a(n) ______________.
A)divalent cation
B)primer
C)stem loop
D)operon
E)consensus
F)amanitin
G)transcription
H)translation
I)repressor
J)transcription bubble
K)catabolite repression
L)promoters

Question

Quizplus · Accepted Answer

The expression of galactosidase requires the induction of an operon by removal of a repressor. In the context of the lac operon, for example, the repressor protein binds to the operator region to prevent transcription. When an inducer (such as allolactose, a derivative of lactose) is present, it binds to the repressor, causing the repressor to change shape and release from the operator, thus allowing transcription of the operon and expression of β-galactosidase.

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