So boys this question is for you... There is this boy I really like and I am pretty sure he likes me too and we kept texting like seriously ALOT and then all of a sudden like about a month ago he started only texting me a tiny bit and every thing he said was one word and I am pretty sure I didn't do anything and this is kinda stressing me out is there a reason he is barely talking to me (PLS ANSWER QUICKLY)

Ask him can y'all call and see wassup check up on him see how he doing and whats on his mind if your tell him how you fell about him.

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