Which letter represents the center of the base

It is made up of phosphate, deoxyribose sugars, and a nitrogen base, which consists of adenine, thymine, guanine, and cytosine. Combined, all of these things form what is called a nucleotide. Nucleotides form the basic structural unit of nucleic acids.

he impacted the society ith his knowwdge and advance our research by years to come

the tariff was created to protect industry in the northern part of the united states. industries in the north were being driven out of business by imported goods that were priced at a low rate. the goal was to protect these industries   by taxing the goods.