The second messenger cyclic amp (camp) is synthesized from atp by the activity of the enzyme adenylyl cyclase. cyclic amp, in turn, activates protein kinase a (pka), also called camp‑dependent protein kinase, which is responsible for most of the effects of camp within the cell. determine the correct steps in the activation of pka, and then place them in the correct order, starting after the adenylyl cyclase reaction.

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.