Unlike prokaryotic cells whose genes are controlled mostly through operons, eukaryotic gene regulation occurs mostly through DNA-binding proteins.
Operons are a combination of genes controlled as single unit. It is a functioning unit. A single strand of mRNA translates multiple process through it. They are usually present only in prokaryotes. It can be of two types: inducible and repressor.
DNA-binding proteins are the ones that bind at specific locations of DNA. They mostly bind to the major groove of B-DNA. They are generally known by the name histone. The histone wrapped by DNA strand is called a nucleosome.
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