THE ENERGY SCORE FOR AEROBIC RESPIRATION

A BALANCE SHEET

T eukaryotic cell obtains a net gain of 36 ATP molecules from the breakdown of ach glucose molecule.

1. GI colysis: Glycolysis produces four ATP molecules. But two are used in the gl colytic reactions. The two molecules of NADH formed during glycolysis produce six ATP molecules. But two are used in the reactions that transport the NI DH electrons across the inner mitochondrial membrane into the matrix.

2. Formation of acetyl COA: One molecule of NADH is pcoduced for each PYruvate converted into acetyl-coenzyme A. One molecule of CO2 is releast, -s acetyl coenzyme A enters into the Krebs cycle.
3. Krebs cycle: •Two more ATP _______________________________________________

molecules are produced in the         PROCESS                     ATP                      NADH,               ATP USED

PRODUCED            FADH₂

Krebs cycle. Similarly, six NADH                                                      PRODUCED

and two FADH₂ molecules are _________________________________________

produced during Krebs cycle.                                                 4 ATI⁾