What are the maximum number of covalent bonds an element with atomic number 16 can make with hydrogen?
a. 1
b. 2
c. 3
d. 4
e. 5

b. regulated is the actual answer to your question.

explanation:

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