Question

lactase and carbonic anhydrase are examples of what type of substance?
○ substrate
○ reactant
○ product
○ enzyme

Explanation:

Lactase and carbonic anhydrase are known to be enzymes. Enzymes are biological catalysts that speed up chemical reactions. Substrates are the substances on which enzymes act, reactants are the starting materials of a reaction, and products are the end results. Lactase breaks down lactose (substrate), and carbonic anhydrase catalyzes reactions involving carbonic acid, so they fit the definition of enzymes.

Answer:

D. enzyme (assuming the options are labeled A to D with D being enzyme; if the original options had different labels, adjust accordingly, but based on the options given: the correct one is the option with "enzyme")