Nucleoid region. Definition. noun. The area within a prokaryotic cell where the genetic material is to be found. Supplement. Prokaryotes are characterized by their lack of a ââtrueââ nucleus.In stead of a nucleus, they have a nucleoid where their genetic material is localized. See also: prokaryote.he area within a prokaryotic cell where the genetic material is to be found. Supplement. Prokaryotes are characterized by their lack of a ââtrueââ nucleus. In stead of a nucleus, they have a nucleoid where their genetic material is localized.
Nucleic acids are the molecules that carry the genetic information that is passed down from parent to child. However, nucleic acids are special since they can also combine with proteins to become the machines -- called ribosomes -- that turn genetic instructions in nucleic acids into other protein machines. Nucleic acids are linked together into a chain. DNA is made of two chains that connect like a rope ladder.
Nucleic Acid Binding Domains. The DNA-or RNA-binding function of a protein is localized in discrete conserved domains within its tertiary structure. An individual protein can have multiple repeats of the same nucleic acid binding domain or can have several different domains found within its structure. The identity of the individual domains and their relative arrangement are functionally important within the protein.