Respiration

• Adenosine Triphosphate
• Main source of energy for cell metabolism

• Adenine molecule
• Ribose Sugar
• 3 Phosphate group
• ALL condensed together

• 30.6 kJ per mole of ENERGY is released
• BREAK THE BOND BETWEEN 2ND AND 3RD PHOSPHATE GROUP (hence energy is stored there)
• Instability of the phosphate bond makes ATP an excellent energy donor.
• As they are highly negatively charged hence repel one another strongly, as phosphate bonds are easily broken

• Substrate level phosphorylation
• Oxidative phosphorylation

• Universal Energy Carrier
• Mobile Energy Carrier
• Easily Formed
• Source of energy for many energy-requiring processess (i.e ACTIVE TRANSPORT)

organic compounds are oxidised within the cells to release chemical energy stored as ATP

• Carbohydrates (FIRST)
• Fats
• Proteins (LAST)

outside the mitochondrion at the cytosol

Inside the mitochondrion

• Substrate level Phosphorylation
• Oxidative Phosphorylation

is the phosphorylation of ADP with inorganic phosphate groups to form ATP

• Glycolysis (cytoplasm)
• Krebs cycle (mitochondrial matrix)

Only small amount of ATP is generated this way