Answer: Mitochondria
Explanation:
The first step of the alcohol metabolism takes place in the cytosol of the cell where the enzyme alcohol dehydrogenase starts to act.
The alcohol here is converted into the acetaldehyde. The acetylaldehyde is metabolized mainly by the alcohol dehydrogenase 2 in the mitochondria to form acetate.
It releases NADH and ROS species which is neutalized by the antioxidants in the human body.