Question : Metabolism is a defining feature of all living organisms without exception. Isolated metabolic reactions in vitro are not living things but surely living reactions. Comment.

Question : Metabolism is a defining feature of all living organisms wi

1.	Question : Metabolism is a defining feature of all living organisms without exception. Isolated metabolic reactions in vitro are not living things but surely living reactions. Comment.
Answer» Solution :The sum total of all the chemical reactions occurring in our body is metabolism. No non-LIVING object exhibits metabolism. Metabolic reactions can be DEMONSTRATED OUTSIDE the body in cell-free systems. An isolated metabolic reaction (s) outside the body of an organism, performed in a test tube is neither living nor non-living. HENCE, while metabolism is a defining feature of all living ORGANISMS without exception, isolated metabolic reactions in vitro are not living things but surely living reactions.