The brain contains of interconnected neurons and glia

The brain contains billions of interconnected neurons and glia.  Glia cells enclosed the  neurons and provide support for and insulation between them. It  is also the most abundant cell types in the central nervous system. While Neurons are the basic units of the nervous system and it is the most important part is the brain. 

answer; i believe the correct answer is ( proteins );

helicase, i think thats it