This document provides information about nucleic acids and their structure. It discusses that nucleic acids are polymers made up of nucleotides that store and transmit genetic information. There are two main types of nucleic acids - DNA and RNA. A nucleotide is composed of a nitrogenous base, a pentose sugar (ribose in RNA and deoxyribose in DNA), and a phosphate group. The nitrogen bases in nucleotides can be purines (adenine and guanine) or pyrimidines (cytosine, thymine, and uracil). DNA has a double-stranded helical structure, with complementary base pairing between adenine-thymine and guanine-cytosine. RNA is typically single-stranded. ATP