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Science (086) — AI-generated practice question

AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.

Q1. [1] medium exam-ready
Which of the following correctly describes the role of bile in digestion? (A) It chemically digests proteins using enzymes. (B) It breaks large fat globules into smaller droplets and makes the medium alkaline. (C) It converts starch into simple sugars. (D) It absorbs digested food directly into the blood.
  1. A It chemically digests proteins using enzymes.
  2. B It breaks large fat globules into smaller droplets and makes the medium alkaline.
  3. C It converts starch into simple sugars.
  4. D It absorbs digested food directly into the blood.
Generated by claude-sonnet-4-6 · 2026-06-26 00:58 · grounding rag
Model Answer

(B) Bile breaks large fat globules into smaller droplets (emulsification) and makes the medium alkaline so that pancreatic enzymes can act on the food.

Source: Life Processes, Section 5.2.4

Explanation

The passage clearly states that bile makes the acidic food coming from the stomach alkaline and that bile salts break large fat globules into smaller globules (emulsification). Bile contains no enzymes, so it does not chemically digest fats — it only physically emulsifies them. Options A, C, and D describe functions of other digestive secretions (pepsin/trypsin, salivary amylase, and villi respectively). Examiners expect students to distinguish between bile's physical (emulsification) and chemical (alkalinisation) roles without confusing it with enzyme action.

Previous-year CBSE Grade 10 board exam questions, organised by subject and chapter, each with a model answer — free to read and print.