Both ATP and CTP are allosteric regulators of the enzyme aspartate transcarbamoylase. Which of the following correctly identifies the activities of these two regulators?

Question

Quizplus · Accepted Answer

ATP is an activator of aspartate transcarbamoylase, but CTP is an inhibitor. The regulation of this enzyme is one of feedback inhibition, in which CTP, the end product of the pathway, inhibits the enzyme, whereas ATP, an indicator of high energy status, activates the enzyme. Therefore, choice B is the correct answer.

Both ATP and CTP Are Allosteric Regulators of the Enzyme