Question

Which compound is a reusable, complex protein that speeds up chemical reactions?

Answer 1

An Enzyme

Step-by-step explanation:

An enzyme is a protein that speeds up chemical reactions by bringing the reactants together. Enzymes can be used over and over again.

Answer 2

Hello there!

The answer is enzymes.
Enzymes are biological catalysts, which means they decrease the amount of activation energy needed to start a reaction, therefore speeding up the rate of the reaction. They are part of the protein macromolecule group. Without them, our bodies would not process things efficiently or fast enough for us to live.

Hope I helped. Have a nice day.