The location in which the enzyme and substrate complexes is called the

Answer;

Active site

Explanation;Enzymes are biological catalysts that functions by binding to one or more of the reactants in a reaction.The substrate of an enzyme are the reactants that bind to the enzyme at the active site and participate in a chemical reaction.The exact location on the enzyme where substrate binding takes place is called the active site of the enzyme. The shape of the active site is such that it fits the shape of the substrate.  Once the substrate or substrates are bound to the enzyme, the enzyme can promote or catalyze the desired reaction in some particular way.

The proton has a positive charge while the neutron has no charge they both make up the nucleus of the atom while the elections have a negative charge and surround the nucleus of the atom. the protons and electrons are used to calculate the atom's mass whereas the neutrons don't affect the mass