Nucleic Acids
Nucleic acids are biopolymers, or large biomolecules, essential for all known forms of life. Nucleic acids, which include DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), are made from monomers known as nucleotides.
Gene
A gene is a region of DNA that encodes a functional RNA or protein product, and is the molecular unit of heredity.
Plasmid
A plasmid is a small DNA molecule within a cell that is physically separated from a chromosomal DNA and can replicate independently.