Cellular Respiration
All Materials Cmassengale

C6H12O6 + 6O2 -----> 6CO2 + 6H20 + energy (heat and ATP)

Energy

Laws of Thermodynamics

Adenosine triphosphate (ATP)

 

 

Enzymes in Metabolic Pathways:

Energy Carriers During Respiration:

NADH: A second energy carrying molecule in the mitochondria; produces 3 ATP

FADH2: A third energy carrying molecule in the mitochondria; produces 2 ATP

Mitochondria:

Cellular Respiration Overview:

C6H12O6 + 6O2 -----> 6CO2 + 6H20 + energy (heat and ATP)

Glycolysis:

h. If no oxygen is available to the cell (anaerobic), the pyruvate will be fermented by addition of 2 H from the NADH (to alcohol + CO2 in yeast or lactic acid in muscle cells). This changes NADH back to NAD+ so it is available for step c above. This keeps glycolysis going!

Alcoholic Fermentation

Lactic Acid Fermentation

Aerobic Respiration:

Kreb's Cycle:

Net Yield from Kreb's Cycle (2 turns)

6 NADH2
2 FADH2
4 CO2
2 ATP

Electron Transport Chain:

O2  +  4e-  +  4H+  2H2O

Energy Yield from Aerobic Respiration

Glycolysis Kreb's Cycle Total

4 NADH2

6 NADH2 10 NADH2 x 3 = 30 ATP

0 FADH2

2 FADH2 2 FADH2 x 2 = 4 ATP

2 ATP

2 ATP                          4 ATP
    38 ATP