With regard to enzymes, what can be said to be the relationship between the substrate and the active site?
a) one (or multiple) substrates can bind to the active site and is changed into product(s).
b) every active site will always accept multiple substrates in order to produce a new product.
c) the active site of an enzyme combines with the substrate, when a product is given to the enzyme, producing a new molecule.
d) a specific product fits into the active site of an enzyme. the enzyme then breaks down the product to make a new substrate.