Question

an enzyme that breaks down lactose. substrate (orange box), names of enzymes (blue box), lactase (green box), specific (red box)

Explanation:

The enzyme that breaks down lactose (the substrate) is lactase. Enzymes are specific to their substrates, and lactase is the enzyme that acts on lactose. So the correct option related to the enzyme breaking down lactose is the one with "Lactase" (the green box here, but in terms of identifying the enzyme, lactase is the enzyme for lactose breakdown).

Answer:

Lactase (the option with "Lactase" as it is the enzyme that breaks down lactose)