As Part of an Experiment, Healthy Volunteers Undergo a 12-Hour

question 121

Multiple Choice

As part of an experiment, healthy volunteers undergo a 12-hour fast and then drink a solution containing radiolabeled alanine.  Consecutive blood samples are drawn every 15 minutes for the next 3 hours.  Initial blood samples detect the radiolabeled alanine, but analysis of later samples shows that the radiotracer is present in blood primarily in the form of glucose.  Before alanine can be converted to glucose, its amino group is transferred to which of the following?

• A)α-Ketoglutarate
• B)L-citrulline
• C)Malate
• D)Citrate
• E)Oxaloacetate

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Definitions:

Fake Cocktails

Non-alcoholic beverages designed to mimic the taste and appearance of alcoholic drinks, often used in social settings.

Sociable

Exhibiting a willingness or tendency to engage with others in a friendly manner.

Withdrawal Symptoms

Physical and mental symptoms that occur after stopping or reducing intake of a substance that was used heavily and regularly.

Tremors

Involuntary, rhythmic muscle contractions resulting in shaking movements in one or more parts of the body.