TEKSForge
Back to the B.11B lesson

Released STAAR Biology EOC · 2025 · Item 29 · 1 point

Walkthrough: Biology 2025, Item 29

B.11B · Enzymes · unscored study

Lipase is an enzyme responsible for breaking fat down in the stomach. Which statement explains the effectiveness of lipase as it moves through the digestive system from the stomach to the intestine?

  1. It becomes less effective because it is used up by fats in the stomach.
  2. It becomes more effective because it acquires energy for more reactions from fats.
  3. It becomes less effective because it is inhibited by the change in pH from the stomach to the intestines.
  4. It becomes more effective because it changes shape and is able to break down other materials in the intestines.

1. Understand the question

Enzymes work best within an optimal pH range. Lipase moves from the acidic stomach to the less acidic intestine.

Try the question on your own first, then reveal one step at a time.

2. Solve it step by step

Practice released items for this skill Back to the lesson

Question, artwork, answer key and rationale: Texas Education Agency released STAAR test. Walkthrough steps written by TEKSForge. Studying here does not change your mastery or scores.