2. Electron Transport
• The passage of energetic electrons through a series
of membrane associated electron carrier molecules
to proton pumps embedded within mitochondrial
or chloroplast membrane
• As the electrons reach the proton pumping
channels, their energy drives the transport of
protons out across the membrane, leading to the
synthesis of ATP
4. Electron Transport
• After Glycolysis and Krebs Cycle, we are left with 10
NADH and 2 FADH₂
• These will undergo oxidation – losing of electrons
• NADH NAD⁺ + H⁺ + 2e⁻
• Electrons during this point has high energy state
• Electrons will go to a lower energy state
• 2e⁻ Coenzyme Q Cytochrome C 2e⁻
• Co Q and Cyt C is used for the reduction of oxygen
• Electrons bind with Co Q and Cyt C to release energy
5. Electron Transport
• 2e⁻ + H⁺ + ½O₂ H₂O
• Electrons are used to reduce oxygen to 1 molecule of oxygen
• 2 hydrogen atoms and 1 oxygen atom
6. Electron Transport
• The released energy from electron binding with Co Q and
Cyt C will then be used by protein complexes in the
cristae to transport hydrogen proton from the matrix to
the outer membrane of the mitochondria.
• NADH is located in the matrix of mitochondria
• Outer membrane will have more hydrogen ion, thus
become acidic
• Mitochondrial Matrix will lose hydrogen ion, thus
become basic
7. Electron Transport
• H⁺ goes out through the protein complex
• H⁺ goes back in through the ATP Synthase
• ATP Synthase has some sort of axle in between
• H⁺ pass through the ATP Synthase to the matrix, which
causes the axle to turn
• As the axle spins, ADP and Phosphate groups binds, forming
ATP
8. Electron Transport
• Each NADH can roughly create 3 ATP
• Each FADH₂ can roughly create 2 ATP
• 10 NADH 30 ATP
• 2 FADH₂ 4 ATP
• Produced in Glycolysis 2 ATP
• Produced in Krebs 2 ATP
38 ATP
• 38 ATP are from 1 molecule of glucose
