easy · MCAT psych-soc

A clinical trial evaluates a drug designed to treat insomnia by increasing the time a specific neurotransmitter remains in the synaptic cleft. The drug targets the neurotransmitter responsible for 'rest-and-digest' activities.

This drug is likely an inhibitor of which enzyme?

  1. Tyrosine hydroxylase
  2. Monoamine oxidase
  3. Acetylcholinesterase
  4. DNA polymerase

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