Cells That Respond to Peptide Hormones Usually Do So Through

Multiple Choice

Cells that respond to peptide hormones usually do so through a sequence of biochemical reactions involving receptor and kinase activation. In order for cells to respond, it is necessary for first and second messengers to communicate. This is possible because ________.

A) peptide hormones are converted by cell membranes enzymes into second messengers
B) hormones alter cellular operations through direct stimulation of a gene
C) G protein acts as the link between first and second messengers
D) the hormone receptor complex moves into the cytoplasm as a unit