a large gene-containing region of dna in the fruit fly drosophila melanogaster is 92,672 base pairs long. the length of linker dna in drosophila is 35 base pairs.

an active site is a region that is present on an enzyme where the reactants or the substrate molecules we can say bind and experience a chemical reaction. the substrate is basically a reactant whose concentration is changing and that is converting into a product after binding at the active site of an enzyme