Science — AI-generated practice question

Bile salts are secreted by the liver and act on fats present in the small intestine. Fats exist as large globules, making enzyme action difficult. Bile salts break these large fat globules into smaller globules (emulsification), thereby increasing the surface area and making enzyme (lipase) action more efficient.

Source: Life Processes, Section 5.2.4

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The key points examiners look for are:

1. Emulsification — bile salts break large fat globules into smaller ones (the specific term scores marks).
2. Why it matters — increased surface area allows lipase to act more efficiently.

The textbook directly compares this to the emulsifying action of soaps, so using the word "emulsification" is important. Don't confuse bile salts with digestive enzymes — bile contains no enzymes but aids enzyme action.