Imagine That You've Set Up a Genetic Screen to Identify

question 15

Multiple Choice

Imagine that you've set up a genetic screen to identify E.coli mutants that cannot metabolize the amino acid tryptophan.Beginning with a master plate containing many colonies,you prepare replica plates on medium with glucose or tryptophan as the only energy source.You would look for colonies that _____.

• A)cannot grow on either type of media
• B)can grow on both types of media
• C)can grow only on the plates with tryptophan
• D)can grow only on the plates with glucose

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Definitions:

Somatic Nervous System

A component of the peripheral nervous system that controls voluntary movements of the body through its control of skeletal muscles.

Sympathetic Nervous System

Part of the autonomic nervous system that prepares the body for physical and mental activity by accelerating heart rate, constricting blood vessels, and raising blood pressure.

Motor Nervous System

Part of the nervous system responsible for controlling voluntary muscle movements in the body.

Spinal Cord

A long, thin, tubular structure made up of nervous tissue, which extends from the brainstem down the back, transmitting neural signals between the brain and the rest of the body.