Cell Organelles: Structure and Functions · Zoology

What is the function of the cristae in mitochondria?

  1. To store calcium ions and regulate ion concentration in the matrix
  2. To increase the surface area available for the electron transport chain
  3. To protect the mitochondrial DNA from cytoplasmic reactive species
  4. To facilitate the import of nuclear-encoded proteins into the matrix
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Correct answer: To increase the surface area available for the electron transport chain

Cristae are the folds of the inner mitochondrial membrane. By increasing surface area, they allow for more copies of electron transport chain complexes and ATP synthase, maximizing energy production.

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