Imagine That You've Added the Same Indicator Used by Monod

Multiple Choice

Imagine that you've added the same indicator used by Monod to E. coli colonies growing on a plate with glucose and no lactose. One colony is yellow and the remainders are white. This result suggests that cells of the yellow colony

A) cannot metabolize lactose.
B) cannot transport lactose into the cell.
C) have constitutively active lacZ and lacY genes.
D) cannot activate either the lacZ or lacY gene.
E) can activate the lacY gene but cannot active the lacZ gene.