CELLULAR RESPIRATION Chapter 7

Cellular (Aerobic) Respiration C6H1206 + O2  CO2 +H2O + ATP The creation of ATP from glucose happens: in four steps: Glycolysis Pyruvate oxidation 3. Krebs cycle 4. Oxidative phosphorylation/Chemiosmosis

GLYCOLYSIS Glucose + 2 ATP + 2 NAD  2 Pyruvic acid + 4 ATP + 2 NADH

GLYCOLYSIS Glucose + 2 ATP + 2 NAD  2 Pyruvic acid + 4 ATP + 2 NADH Input Output Output

Glycolysis Important things to remember: Glycolysis occurs in the cytoplasm. 2 ATPs were produced. (2 were input at the start so a total of 2 were produced for future use). 2 pyruvic acids were formed. 2 NADH (for future ATP creation) were formed.

The Mitochondria

Pyruvate Oxidation Depends on oxygen availability. When oxygen is present, pyruvic acid enters the mitochondria. Each pyruvic acid (3 carbon molecule) are converted to Acetyl CoA (2 carbon molecule). Carbon dioxide is released as a waste product. 2 Pyruvic Acid + 2 Coenzyme A + 2 NAD  2 Acetyl CoA + 2 CO2 + 2 NADH

Krebs Cycle

Krebs Cycle

Electron Transport Chain Review Explosive release of energy as heat that cannot be harnessed for cellular work H2O

C H E M I O S

Energy Yield of Respiration

Anaerobic respiration Use of inorganic molecules (other than O2) as final electron acceptor.

Fermentation Ethanol fermentation Lactic acid fermentation