Biochemistry Mechanisms of Enzyme Action 25d6f855 Alcohol dehydrogenase is a/an - A Transferase B Hydrolase C Ligase D Oxidoreductase High-Yield Explanation Ans. is 'd' i.e., Oxidoreductase o Alcohol dehydrogenase is a NAD-linked dehydrogenase (oxidoreductase)o It catalyzes the oxidation of ethanol to acetaldehyde.