Stage 2 - kerbs cycle

• stage 2 takes place iin the mitochondria of the cells
• this stage requires oxygen - a lot of energy is produced
• makes NADHs
• If oxygen is present pyruvic acid enters a mitochondrion
• pyruvic acid is converted into a small 2-carbon molecule called acetyl coenzyme A
• in the Kerbs cycle acetyl co-enzyme A is broken down to form carbon dioxide and water
• energy rich electrons are released
• these electrons are picked up by NAD+s and used to form NADHs
• The NADH produced is sent to the electron transport chain
• ADP is converted to ATP
• 2 Co2 molecules are made in the process
• end products - CO2, ATP, electrons and protons