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Science — AI-generated practice question

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

Q1. [1] straightforward initial-understanding
The break-down of pyruvate using oxygen takes place in which cell organelle? (a) Nucleus (b) Cytoplasm (c) Chloroplast (d) Mitochondria
  1. a Nucleus
  2. b Cytoplasm
  3. c Chloroplast
  4. d Mitochondria
Generated by claude-sonnet-4-6 · 2026-06-15 06:41 · grounding rag
Model Answer

(d) Mitochondria

The breakdown of pyruvate using oxygen (aerobic respiration) takes place in the mitochondria.

Explanation

This is directly supported by Exercise Q4 in Chapter 5, which states that breakdown of pyruvate to give carbon dioxide, water and energy takes place in the mitochondria. Cytoplasm is where glycolysis (breakdown of glucose to pyruvate) occurs — not the oxygen-dependent breakdown of pyruvate. Examiners expect the single correct option with its letter.

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