Respiration: Oxidative Phosphorylation

Question 1

Location

Answer 1

Membrane of cristae via ETC

Question 2

OP- Step 1

Answer 2

• NADH from KC binds to complex 1 releasing H+ and e-
  -NAD Hydrogen carrier goes back to Krebs cycle to be reused
• FADH binds to complex 2 releases H+ and e-
• protons move to mitochondrial matrix
• e- go into ETC

Question 3

OP- Step 2

Answer 3

• electrons passed down chain of protein complex with higher affinity than the previous
• for every H released by NADH 4 protons pumped into intermembrane space

Question 4

OP- Step 3

Answer 4

• electrons accepted by terminal acceptor oxygen
• electrons combine with H+ to form a H atom which combines with O2 to form water

Question 5

OP- Step 4

Answer 5

• pumping of protons to the intermembrane space creates a proton gradient
• protons move across membrane via facilitated diffusion through ATP synthase
• produces ATP