1. Describe the process of aerobic respiration
Link the stages in aerobic respiration to the locations they occur within the cell

2. What do we know about Aerobic Respiration?
What does it mean?
What’s the point of it?
Where does it happen?
What fuels does it use?
What’s the equation for it?
Ext- What are the 3 main processes involved?

3. The Stages of Aerobic Respiration
3 main stages:
Glycolysis
Krebs Cycle
Electron Transport Chain
1st stage – glycolysis – happens in cell cytoplasm.
2nd stage – Krebs cycle – happens in mitochondrial matrix
3rd stage – ETC – happens in Mitochonrial Cristae

6. Fuels… Primary fuel for aerobic respiration is glycogen
Has to be broken down into glucose first and then it goes through all three stages of respiration
Other fuels are fatty acids and amino acids which enter respiration in stage 2 – Krebs Cycle.

7. Glyco = Glucose Lysis = Splitting
Glycolysis
Glyco = Glucose Lysis = Splitting
Occurs in the cytoplasm
Glucose is converted into Glucose–6–Phosphate
Enzyme involved = PFK (phosphofructokinase)
Glucose–6–Phosphate is oxidised by the removal of 2 H2 molecules
Glucose-6-Phosphate is split into 2 molecules of Pyruvate
Energy is released and used to form 2 x ATP molecules

8. Krebs Cycle Occurs in the Matrix of Mitochondria
Pyruvate is decarboxylated (CO2 released) and oxidised (hydrogen removed) into Acetyl Co A (a 2 carbon molecule)
Enzyme involved is pyruvate dehydrogenase
Acetyl Co A enters Krebs Cycle and joins with a 4 carbon molecule
This forms 6 carbon Citrate
Citrate is oxidised and decarboxylated back into the 4 carbon molecule, which joins with another Acetyl Co A
1 ATP is formed from each Pyruvate – 2 from each glucose
The main point of Krebs Cycle is to remove all the Hydrogen from the pyruvate – 10 removed here plus the 2 from glycolysis.

9. Electron Transport Chain
Occurs in mitochondrial inner membrane (Cristae)
Hydrogen is split into protons (H+) and electrons (e-)
Electrons are passed along a series of electron carriers
As they are passed along, energy is released
The energy is used to resynthesise ATP
34 ATP are synthesised from the Hydrogen removed from each Glucose molecule that enters glycolysis.
Oxygen is the terminal electron acceptor
The protons and electrons both combine with oxygen to form water.

10. + Energy to resynthesise 38 ATP
Carbon
Dioxide
Glucose
+ Oxygen
+ Water
+ Energy to resynthesise 38 ATP
C6H12O O2 6CO2 + 6H2O
38 ADP + 38 Pi ATP

11. 4c Molecule