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Question: Explain the structure of DNA and how it differs from RNA. Answer: DNA, or deoxyribonucleic acid, is a double helix-shaped nucleic acid composed of nucleotides that have a deoxyribose sugar, a phosphate group, and one of four nitrogenous bases - adenine (A), thymine (T), guanine (G), and cytosine (C). In its double helix structure, adenine pairs with thymine and guanine pairs with cytosine. DNA primarily stores genetic information. RNA, or ribonucleic acid, is a single-stranded nucleic acid composed of nucleotides that have a ribose sugar, a phosphate group, and one of four nitrogenous bases - adenine (A), uracil (U), guanine (G), and cytosine (C). Unlike DNA, RNA is responsible for translating stored genetic information into proteins and has various roles in protein synthesis, with three main types: messenger RNA (mRNA), transfer RNA (tRNA), and ribosomal RNA (rRNA).