DNA (Deoxyribonucleic Acid):
DNA, short for deoxyribonucleic acid, is a molecule found in cells, containing carbon, hydrogen, oxygen, nitrogen, phosphorus, and occasionally sulfur. It consists of two long chains of nucleotides arranged in a double-helix structure. Each nucleotide comprises a 5-carbon sugar molecule bonded to a phosphate group (–PO3) and an organic base. These bases include adenine (A), thymine (T), cytosine (C), and guanine (G), which form complementary base pairs, facilitating the replication and transmission of genetic information.