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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
In which part of the cell does the breakdown of pyruvate using oxygen take place?
  1. A Cytoplasm
  2. B Mitochondria
  3. C Chloroplast
  4. D Nucleus
Generated by claude-sonnet-4-6 · 2026-06-10 02:58 · grounding rag
Model Answer

Option B: Mitochondria

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

Source: Life Processes, Chapter 5 (Exercise Q.4)

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Explanation

The textbook exercise (Q.4) directly states that breakdown of pyruvate to give carbon dioxide, water and energy takes place in the mitochondria. This is a standard fact: mitochondria are the site of aerobic respiration. Cytoplasm is where glycolysis (glucose → pyruvate) occurs; the subsequent oxygen-dependent breakdown of pyruvate happens inside the mitochondria. Examiners expect the single correct option — B.

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