Question

Q5. Label correctly the names of different processes that generate ATP as shown below (substrate-level or oxidative phosphorylation?). [3pts] Oxidation of Organic Fuel Molecules During Cellular Respiration Electrons carried via NADH Electrons carried via NADH and FADH, Glycolysis Glucose Pyruvate Pyruvate oxidation Acetyl COA Citric acid cycle Oxidative phosphorylation: electron transport and chemiosmosis CYTOSOL MITOCHONDRION

Answer 1

1. Substrate level phosphorylation

In glycolysis, pyruvate kinase in the presence of magnesium and potassium ion catalyses the transfer of a phosphate group from phosphoenolpyruvate (PEP) to ADP thereby forming ATP and pyruvate.

2. Substrate level phosphorylation

In TCA cycles, the cleavage of thioester bond of succinyl - CoA is coupled with the phosphorylation of ADP into ATP catalysed by Succinate Thiokinase

3. Oxidative phosphorylation

As the process itself reflects, the electrons from electron carriers like NADH are transferred through Electron Transport Complex to oxygen , to form water. This process produces ATP through the pumping of protons across the ATP synthase.