Question

responsible for breaking fat down in the stomach. which statement
ness of lipase as it moves through the digestive system from the stomach
it becomes less effective because it is used up by fats in the stomach.
it becomes more effective because it acquires energy for more reactions
from fats.
it becomes less effective because it is inhibited by the change in ph from the
stomach to the intestines.
it becomes more effective because it changes shape and is able to break
down other materials in the intestines.
clear all

Explanation:

Enzymes like lipase have an optimal pH for activity. The stomach has a low (acidic) pH and the intestines have a higher (more neutral - slightly alkaline) pH. A change in pH can denature the enzyme (alter its shape) or inhibit its activity. Enzymes are not "used up" in reactions (they are catalysts), and they don't "acquire energy" from substrates in the way described in the second option. Also, enzymes are specific in their action (lock - and - key or induced - fit model), so they don't just change shape to break down other materials effectively as in the fourth option.

Answer:

It becomes less effective because it is inhibited by the change in pH from the stomach to the intestines.