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🔬 Biology  ·  Cell: The Unit of Life  ·  NEET

Which cellular structure is the site of the electron transport chain?

Answer: Inner mitochondrial membrane.

  • A Inner mitochondrial membrane
  • B Outer mitochondrial membrane
  • C Mitochondrial matrix
  • D Endoplasmic reticulum

Correct answer: A. Inner mitochondrial membrane

Explanation: The electron transport chain complexes (I-IV) are embedded in the inner mitochondrial membrane. ATP synthase (Complex V) is also there.

Labeled diagram of an animal cell showing nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and other organelles

Animal cell structure with major organelles labeled. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.

Concept context

Cell theory, prokaryotic vs eukaryotic cells, organelles and their functions. Foundation of all biology.

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