What are scaffolding proteins?
A. microtubular protein arrays that allow lipid-soluble hormones to get from the cell membrane to the nuclear pores
B. ladderlike proteins that allow receptor-ligand complexes to climb through cells from one position to another
C. large molecules to which several relay proteins attach to facilitate cascade effects
D. relay proteins that orient receptors and their ligands in appropriate directions to facilitate their complexing
E. proteins that can reach into the nucleus of a cell to affect transcription
Answer: C