C1.2 Cell Respiration

Krebs Cycle

-Occurs in matrix of the mitochondria

• 2C Acetyl-CoA from the link reaction joins 4C Oxaloacetate

• Successive decarboxylation

• Carbon compounds= oxidised to reduce NAD and FAD;

• Yields 4 CO2 per glucose; 2ATP; 6 NADH; 2FADH2;

• Substrate level phosphorylation

Oxidation in terms of electrons

Loss of electrons

Oxidation in terms of oxygen

Gain of oxygen

Oxidation of terms of hydrogen

Loss of hydrogen

Oxidation results in … bonds

many C-O

Oxidation results in a compound with…

lower potential energy.

Reduction in terms of electrons

Gain of electrons

Reduction in terms of oxygen

Loss of oxygen

Reduction in terms of hydrogen

Gain of hydrogen

Reduction results in … bonds

many C-H

Reductions results in a compound…

with higher potential energy