oxidative phosphorylation

Question 1

what is the total amount of reduced coenzymes produced from 1 glucose molecule ?

Answer 1

• 10 reduced NAD
• 2 reduced FAD

Question 2

what is mostly made in oxidative phosphorylation ?

Answer 2

• most ATP is made during this stage

Question 3

what does this stage involve ?

Answer 3

• the electron transfer chain
• movement of protons across the inner mitochondrial membranes (cristae)
• catalysed by ATP synthase

Question 4

what was the role of the reduced coenzymes ?

Answer 4

• to carry the protons and electrons to the final step of respiration

Question 5

what is the role of oxygen in oxidative phosphorylation ?

Answer 5

• oxygen can pick up the electrons at the end of the electron transfer chain
• as well as picking up the protons from atp synthase
• this will create water

Question 6

what is the name given to oxygen in oxidative phosphorylation ?

Answer 6

• terminal electron acceptor

Question 7

what is the equation that makes water from oxygen in oxidative phosphorylation ?

Answer 7

0,5 O2 + 2H+ + 2e- —–> H2O

Question 8

what is the importance of oxygen in respiration ?

Answer 8

• oxygen acts as the terminal electron acceptor
• without oxygen, electrons would not be passed down the electron transfer chain
• protons would not be transported across the membrane
• there would be no electrochemical gradient
• so ATP would not be generated

Question 9

why is aerobic respiration much more efficient than anaerobic respiration ?

Answer 9

• anaerobic respiration only generates 2 molecules of ATP for each molecule of glucose
• aerobic respiration generates 36 ATP for each molecule of glucose