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Mitochondria:

Electron Transport in the Cristae

Caitlin Mooney

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Mitochondria Structure

Cytoplasm: Location of glycolysis

Matrix: Location of transition reaction/Krebs cycle

Cristae: Location of electron transport system

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Electron Transport System

  • 4th step of Aerobic Respiration
  • Transports energy from electrons
    • Carried from Hydrogen atoms (NADH and FADH₂)
  • Through series of redox reactions
    • Using cytochromes from the cristae
      • Cytochromes: Iron containing molecules → electron acceptors
    • Transfer electrons sequentially
    • Final electron/hydrogen acceptor is Oxygen
      • Causing formation of H2O

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Energy Production

NADH→3 ATP

FADH₂→2 ATP

ATP

ATP

ATP

ATP

ATP

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Chemiosmosis Theory

Proton Pump

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  • How the electron transport system works
  • Creates proton gradient

High concentration

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Low concentration

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  • Protons want to go back into matrix
  • Go through ATP synthase complex→ Produce ATP

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Works Cited

Urry, Lisa A., et al. Campbell Biology in Focus. Pearson, 2014.

Ippolito, Charles, director. Chapter 07 Cellular Respiration and Fermentation Part 2 Aerobic Respiration. Screencast.com, 2006, www.screencast.com/users/CIppolitoSci/playlists/Metabolism%20Bioenergetics%20Photosynthesis%20Respiration?mediaSet Id=f552fa40-5bbe-4c19-ac53-f265d3f58137.

“Mitochondrial Cristae.” Study.com, Study.com, study.com/academy/lesson/mitochondrial-christae-definition-function-quiz.html.

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“Oxidative Phosphorylation.” Khan Academy, Khan Academy, www.khanacademy.org/science/biology/cellular-respiration-and-fermentation/oxidative-phosphorylation/a/oxidative-phosphorylation-etc.

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