In signal transduction, phosphatases ________.
A) move the phosphate group of the transduction pathway to the next molecule of a series
B) prevent a protein kinase from being reused when there is another extracellular signal
C) amplify the transduction signal so it affects multiple transducers
D) amplify the second messengers such as cAMP
E) inactivate protein kinases and turn off the signal transduction

Question

Quizplus · Accepted Answer

Phosphatases remove phosphate groups from proteins or enzymes, leading to their deactivation. In signal transduction pathways, protein kinases add phosphate groups to activate downstream targets, and phosphatases reverse this process by removing phosphate groups from the activated targets, terminating the signal and turning off the pathway. Therefore, Choice E is the correct answer as it describes the function of phosphatases in signal transduction.

In Signal Transduction, Phosphatases ________