Question

the diagram below illustrates a biochemical process that occurs in organisms.
sugar + water with catalyst → simple sugar + simple sugar with catalyst
the substance labeled \catalyst\ is also known as

1. a hormone
2. an enzyme
3. an antibody
4. an inorganic compound

Explanation:

The diagram shows a sugar being broken down into simple sugars with water and a catalyst. In organisms, biological catalysts that speed up biochemical reactions (like the breakdown of sugars) are called enzymes. Hormones are chemical messengers, antibodies fight pathogens, and inorganic compounds lack carbon-hydrogen bonds—none of these act as biological catalysts for such reactions. Thus, the catalyst here is an enzyme.

Answer:

1. an enzyme