Read the following statements regarding the mitochondrial electron transport system (ETS): Statement I: A mobile electron carrier 'A' receives reducing equivalents from both Complex I and Complex II and transfers them to Complex III. Statement II: A small protein 'B' attached to the outer surface of the inner mitochondrial membrane acts as a mobile carrier for the transfer of electrons between Complex III and Complex

Step-by-step solution

In the mitochondrial ETS, electrons from NADH (Complex I) and FADH₂ (Complex II) are transferred to Ubiquinone (carrier A) located within the inner membrane. Reduced ubiquinone (ubiquinol) is then oxidised by transferring electrons to Cytochrome c via the Cytochrome bc₁ complex (Complex III). Cytochrome c (carrier B) is a small mobile protein attached to the outer surface of the inner membrane that shuttles electrons from Complex III to Complex IV (Cytochrome c oxidase). Plastoquinone and Plastocyanin are electron