Insulin Is a Hormone Produced by the Pancreas

Insulin is a hormone produced by the pancreas. When insulin binds to its receptor, which of the following will occur?

A) The G- protein will become active when GTP is replaced by GDP.
B) A receptor tyrosine kinase will change its conformation i.e. form a dimer) thereby allowing phosphorylation to occur.
C) A G- protein will change its conformation to the "on" position thereby allowing the effector to be activated.
D) A receptor tyrosine kinase will dissociate into two monomers thereby allowing phosphorylation to occur.