I have read that enzymes act as catalysts to reactions in our bodies and that they are extremely target-specific.
My question is how did our body know that a particular enzyme could act as a catalyst for a particular reaction? How did de we get the perfect combination of reactants and their catalysts?
Note:- I am not a person who is studying biology so I might not know that which is pretty obvious to you people.
Anyways, the least expected answer is that ancient aliens carried out some sort of Worldwide Enzyme Injection Programme ;-)
Edit:- By the knowledge gained after asking this question I've figured out that it might be something like this -
There were species which had a different set of enzymes than us but as these weren't the right match the species perished. Those who had the right enzymes survived. Am I right ?