3. Ofthe following events, which best describes the steps in a signal transduction pathway? a)Tyrosine kinase receptor subunits dimerize; b) An enzyme cascade occurs, increasing
of activated proteins; c) A reconfigured protein binds to DNA, altering gene expression; d) A signal
molecule is bound by a transmembrane tyrosine kinase receptor protein; e) The receptor protcin
complex phosphorylates other proteins.
(A) adbec
(B) adecb
(C) daebc
(D) deabc
(E) aedcb