Nucleotide, gene, DNA, chromosome
Nucleotides are the building blocks of nucleic acids (such as DNA and RNA), and are made up of a nucleoside that is joined to a phosphate group.
Genes are an important sequence of nucleotides, and small part of DNA that contains information for a specific protein.
DNA is a genetic material that stores information as a code which is composed of four chemical bases (adenine (A), guanine (G), cytosine (C), and thymine (T)).
Chromosomes are thread-like structures in which DNA molecule (nucleic acid) and protein (histones) are packaged in the cell’s nucleus. Chromosomes functions by carrying genetic information in the form of genes.