1st acetly CoA ( 2-c compound) binds with

oxaloacetate a 4-c-compound, forming citrate a 6-c-compund

2nd citrate ( 6-c-compound)gets oxidized and..

NAD+ removed e- from citrate and gets reduced to NADH, and a CO2 is released. so the 6c compound is now a 5c compund

3rd the 5c compound..

gets oxidized by NAD+ removing e-, then NAD+ gets reduced to NADH and another CO2 is released. now the 5c compound is now a 4c compound

4th the 4-c compound...

gets oxidized

5th GDP gets phosphorylated ...

to GTP, and GTP is used to phosphorylated GDP to ATP

6th FAD oxidizes to 4-c compound and gets reduced...

to FADH2,

then 4-c compound oxidized again...

by NAD+ which gets reduced to NADH, and H2O enters