During a dehydration reaction, two monomer molecules are covalently bonded to each other, with the loss of a water molecule. In this reaction, each monomer contributes part of the water molecule that is released during the reaction. This reaction is repeated as monomers are added to the chain one by one, making a polymer.
I think it would be more like a book of blue prints because you have so much in your DNA like a book but one blue print just shows you one structure. <span />
