Which of the following is essential in an electron transport system?

The correct answer is: Ubiquinone

• Ubiquinone is a lipid-soluble benzoquinone that acts as an electron carrier in electron-transfer chains that are connected with membranes.
• When ubiquinone is reduced with one electron, it generates the semiquinone radical, and when reduced with two electrons, it forms ubiquinol.
• Because it is tiny and hydrophobic, it is freely diffusible within the inner mitochondrial membrane's lipid bilayer.
• It relates electron flow to proton movement because to its ability to carry both electrons and protons.
• Acetyl CoA is the result of pyruvate oxidative decarboxylation and enters the Kreb cycle for full decarboxylation.
• Acetyl CoA condenses with OAA to create citrate, the Kreb cycle's initial tricarboxylic acid. The nonbiological electron acceptor is ferricyanide.
• Hence, option A is the correct response.