Name two facts
about the
Sun-Earth-Moon

The Sun accounts for 99.86% of the mass in the solar system, Moon is Earth's only permanent natural satellite, Earth's rotation is gradually slowing.  

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

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