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