Final answer:
The coenzyme form of riboflavin is flavin adenine dinucleotide (FAD), involved in the cellular energy production processes, cycling between its oxidized form FAD and reduced form FADHâ‚‚.
Step-by-step explanation:
The coenzyme form of riboflavin is flavin adenine dinucleotide (FAD). Riboflavin, also known as vitamin B2, is critical in the body's energy production processes. It has a role in the oxidation-reduction reactions within the cell by cycling between two forms: the oxidized form, FAD, and its reduced form, FADHâ‚‚. This cycling allows for the temporary storage and transfer of electrons, which is essential in cellular metabolism, particularly during energy extraction from sugars. Furthermore, NADP+ is a related coenzyme to NAD+, with the addition of an extra phosphate group, and this plays an important role in anabolic reactions and photosynthesis, especially in plants.