Nonprotein, inorganic substances that enable enzymes to carry out chemical reactions are A. trace minerals. B. major minerals. C. ultratrace minerals. D. co-factors. E. hormones.

co-factors

Explanation:

Co-factors are the inorganic substances that are non-proteinaceous and assist the enzymes to efficiently carry out the various chemical reactions that take place in the body. These co-factors are usually derived from water-soluble vitamins through the process of phosphorylation. The enzyme in the absence of their cofactors is known as apo-enzyme however after it has bound to its cofactor it becomes fully functional and then is known as the holoenzyme.