A$)$ Electron Transport Chain

$----=-$

$1)$ Occurs in the cytoplasm beginning immediately upon glucose entry

$2)$ Water is produced as electrons and H are accepted by oxygen

B$)$ Glycolysis

$3)$ Most of the electrons fueling ATP production originate in this stage

$4)$ Begins with $6-$carbon molecule; Ends with two $3-$carbon molecules

C$)$ Fermentation

$5)$ Recycles NADH back into NAD, occurring in the cytoplasm

$6)$ Electrons from carbon$-$carbon bonds picked up by NAD in the mitochondria

D$)$ Citric Acid Cycle

$7)$ Membrane proteins concentrate H on one side of the membrane

$8)$ Converts pyruvate into lactic acid to allow glycolysis to continue running