Help I will give brainliest I need help with 12

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

the titanic would be the correct answer

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if you add everything up correctly you should get 69 i got this because 50 plus 19 is it