Question

Metal ions such as Zn++ and Mg++ are often required for enzyme activity. These ions are examples of:

a) Cofactors.
b) Inhibitors.
c) Coenzymes.
d) Substrates.

Answer 1

Zn++ and Mg++ are inorganic ions that act as cofactors, which are necessary for the optimal activity of many enzymes, such as DNA polymerase.

Step-by-step explanation:

Metal ions such as Zn++ and Mg++ that are often required for enzyme activity are examples of cofactors. These are inorganic ions that participate in the catalysis of reactions by stabilizing the structure of enzymes, allowing them to function more effectively. Metalloenzymes, such as DNA polymerase, rely on these metal ions like zinc to be fully functional. Cofactors differ from coenzymes in that coenzymes are organic molecules, often derived from vitamins, that are also necessary for enzymatic activity. This distinction is central to understanding the role that various substances play in the biochemistry of living organisms.