Is a class of proteins, they make metabolic reactions proceed much faster than they would have on their own

Answer;

-Enzymes

Enzymes are class of proteins, they make metabolic reactions proceed much faster than they would have on their own.

Explanation;

-Proteins are biological macromolecules that are diverse in shape size and function. Enzymes are biological molecules (proteins) that act as catalysts and help complex reactions occur everywhere in life. They are biological catalysts.

All enzymes are proteins by definition. But not all biomolecular catalysts are proteins. Most enzymes are proteins, although a few are catalytic RNA molecules.

nucleus

would be most reasonable answer tbh