Answer:
The purpose of a cofactor is to act as non-protein, inorganic components of enzyme catalysis. Coenzymes are a specific type of organic cofactor. They are reduced during the Krebs cycle, which is an important part in cellular metabolism.
Explanation:
Enzymes are proteins which mediate chemical reactions in biological systems. Their cofactors are inorganic molecules that act as companions to enzymes which cause the enzymes to undergo structural conformational changes in their and facilitate recognition and binding of substrates. examples: K+, Ca²+, Mg²+
Coenzymes are organic molecules which function like cofactor and undergo reactions with the enzyme; they provide electrons or part of substrates. examples: FAD, NAD+
In the Krebs cycle enzymes cause the oxidation on fuel sources into carbon dioxide while the coenzymes FAD, NAD+ ubiquinone undergo reduction; these become oxidized again via the transfer of their electrons to oxygen, forming water as a byproduct.
