In the Presence of Both Lactose and Glucose, Which of the Following

question 44

Multiple Choice

In the presence of both lactose and glucose, which of the following occurs with the E. coli lac operon?

• A) The lacI gene does not produce repressor.
• B) The cAMP-CAP complex is not available to bind near or at the lac promoter.
• C) The lacZ and lacY genes are fully expressed.
• D) Lactose is converted to glucose and galactose.
• E) Lactose binds to the operator.

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Definitions:

Meninges

The three layers of protective tissue called the dura mater, arachnoid mater, and pia mater that encase the brain and spinal cord.

Myelin Sheaths

Protective coverings around nerve fibers that facilitate the rapid transmission of neural signals.

Synaptic Vesicles

Small sacs within a neuron that store neurotransmitters, which are chemicals released to communicate with adjoining neurons at a synapse.

Dopamine System

A neural system involved in reward, motivation, and the regulation of mood, whose key neurotransmitter is dopamine.