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

question 29

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