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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] straightforward exam-ready
Which of the following is the correct site for the breakdown of pyruvate in aerobic respiration? (A) Cytoplasm (B) Nucleus (C) Mitochondria (D) Chloroplast
  1. A Cytoplasm
  2. B Nucleus
  3. C Mitochondria
  4. D Chloroplast
Generated by claude-sonnet-4-6 · 2026-06-26 00:58 · grounding rag
Model Answer

(C) Mitochondria

The breakdown of pyruvate using oxygen (aerobic respiration) takes place in the mitochondria, producing carbon dioxide, water, and energy.

Explanation

The textbook (Chapter 5, Respiration) clearly states: "Break-down of pyruvate using oxygen takes place in the mitochondria." Note that the first step (glucose → pyruvate) happens in the cytoplasm, but the aerobic breakdown of pyruvate specifically occurs in the mitochondria. This distinction is commonly tested in MCQs.

Source: Chapter 5 – Life Processes, Section 5.3 Respiration

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