Dna plays a major role in heredity, composing the genes that are passed down from parent to offspring. it also plays a major role in the everyday workings of your cells. it does this by creating molecules, such as enzymes, that regulate cell functions.
these enzymes belong to a larger class of molecules known as
a)
rna.
b)
proteins.
c)
ion pumps.
d)
amino acids.

In biochemical reactions, it is mostly triggered by enzymes. Enzymes are important components in the process that involves metabolism and digestive functions, further, most of these enzymes are proteins.Proteins are biological macromolecule and mostly composed of enzymes. Proteins play a role in the physical make-up of a cell or acts as a cytoskeleton –maintains cell shape and figure. These proteins plays different roles and works with nucleic acids and other macromolecules in the cells including cell cycle, cell adhesion, immune response and cell indicators.  

Active site is where they touch.