The term 'chain unit' can be broken down into four crossword solutions: LINK hover:text-barberry-yellow'>STORE (5 letters), LINK hover:text-barberry-yellow'>ISLE (4 letters), LINK (4 letters), and dnamolecule (11 letters). A LINK hover:text-barberry-yellow'>STORE is a place where goods and services are sold, usually to the public. An LINK hover:text-barberry-yellow'>ISLE is a small island, often found in a body of water such as a lake or ocean. A LINK is a connection between two things, such as a bridge connecting two land masses. Finally, a dnamolecule is a molecule that contains genetic information, which is found in all living organisms.