Scientists are attempting to characterize a novel neurotransmitter, neurotran-Y (NTY), which is synthesized by the enzyme neuro-y-oxidase (NYO) from a precursor, neuro-A. In an experiment they inject artificially high levels of NTY into the pre-synaptic terminal of a cell that releases NTY. Shortly thereafter, they measure the activity of NYO and observe that its activity has been suppressed. The scientists have found evidence for

Question

Quizplus · Accepted Answer

The suppression of the enzyme neuro-y-oxidase (NYO) activity upon artificially high levels of NTY suggests a regulatory mechanism where the presence of the neurotransmitter inhibits its own synthesis. This is a classic example of feedback inhibition, where the product of a pathway inhibits an enzyme involved in its synthesis to prevent overproduction.

Scientists Are Attempting to Characterize a Novel Neurotransmitter, Neurotran-Y (NTY)