Question

What role do vitamins play?

Answer 1

A.  

provide an energy source for the body

B.  

contribute raw material to help build tissue

C.  

facilitate and regulate metabolic processes in the body

D.  

bind with substrates and cause a biological reaction

Answer 2

Vitamins are essential compounds that must be acquired through the diet because the body can't synthesize them. One of the reasons vitamins are needed is because they play an indirect role in catalysis, in which enzymes speed up chemical reactions. :D