Question

All Parts of Ubiquinone Have a Function In electron transfer, only the quinone portion of ubiquinone undergoes oxidation-reduction; the isoprenoid side chain remains unchanged. What is the function of this chain?

Answer 1

Ubiquinone is a lipophilic coenzyme present in the animals and bacteria group of organism.

The ubiquinone is found in the plasma membrane of the bacteria and the inner mitochondrial membrane of the mitochondria. They help in the transfer of electrons during electron transport chain.

Ubiquinone is composed of the 2,3-dimethoxy-5-methylbenzoquinone nucleus and two side chains composed of isoprenoid.

The isoprenoid remains unchanged as they make ubiquinone soluble in lipids which allows it to diffuse across the membrane. This help in the transfer of electrons during electron transport chain.

Thus, make ubiquinone soluble in the lipid bilayer and allow to move in the lipid bilayer is the correct answer.