Monod's group found that that appearance of ?-galactosidase correlated with that of galactoside permease. This ultimately led his group to the conclusion that:

A. constitutive expression involved two genes.
B. ?-galactosidase production is contingent on the presence of galactosidase.
C. the expression of ?-galactosidase and permease is under the control of another gene.
D. a mutation in the ?-galactosidase gene would decrease expression of a permease gene.
E. a mutation in the regulator gene would decrease expression of galactosidase and permease.


C

Biology & Microbiology

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