Plz explain these few lines...{underlined lines in blue}

Metabolic reactions can be carried out outside the body of an organism in cell free systems.such reactions are neither living nor nonliving.The isolated in vitro metabolic reactions can,however ,be called biological reactions or living reactions as they involve biochemicals.

Dear student.

All living organisms are made up of chemicals. These chemicals can change into different biomolecules through various chemical reactions. The sum total of all chemical reactions occurring in the body of living organisms is known as metabolism. So, all the living organisms whether unicellular or multicellular exhibit metabolism. However, metabolic reactions can also be carried out outside the body in a cell free system. So, the metabolic reactions are living reactions since they are the characteristic feature of living organisms but isolated metabolic reactions carrying out 
in vitro represent the non-living things.


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The metabolic reactions which are carried out f the body and even out of the cell of an organism are neither included in living reactions nor nonliving reactions

Vitro Of a biological process) made to occur outside the living organism, i.e. in an artificial environment such as within a glassware, a test tube, metabolic reactions in them can de called as living reactions
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Metabolic processes which are carried outside an individual cell, in an artificial environment i.e., in vitro, can neither be called as living as it is not occurring within a cell nor it can be called as non living as it involves biochemicals such as enzymes. So these type of metabolic reactions are called as biological reactions.
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