Science (086) — AI-generated practice question

Bile juice is secreted by the liver and acts on fats in the small intestine. Fats are present in the intestine as large globules, making it difficult for enzymes to act on them. Bile salts break these large globules into smaller globules — a process called emulsification. This increases the surface area available for the pancreatic enzyme lipase to act efficiently, thereby aiding in the complete digestion of fats into fatty acids and glycerol.

Source: Life Processes, Section 5.2.4

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The key concept here is emulsification, not direct enzymatic action. Examiners expect students to:

1. State that bile is secreted by the liver.
2. Explain that fats exist as large globules in the intestine.
3. Use the term emulsification — bile salts break large fat globules into smaller ones.
4. Link it to increased surface area for lipase to act.

Do not say bile "digests" fats — it only prepares them for enzymatic digestion. This distinction is important for full marks.