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

question 10

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.

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Definitions:

PET Scan

Positron Emission Tomography, a medical imaging technique that produces a three-dimensional image of functional processes in the body.

Amygdala

A neural structure in the temporal lobe of the brain involved in processing emotions, especially fear and pleasure.

Limbic System

A complex system of nerves and networks in the brain, involved in emotions and drives, as well as the formation of memories.

Narcolepsy

A long-term sleeping condition marked by excessive sleepiness during the day and abrupt episodes of sleep.