How many milky ways are there

There’s only 1 Milky Way galaxy

Explanation:

Astronomers estimated that there are about 100 thousand million stars in the Milky Way alone. Outside of that, there are millions upon millions of other galaxies also!

Explanation:

I learned this in like 7th grade

Hope this helped :

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products