What percentage of water occurs of the total cellular mass?

An organic compound present in a living cell in a very small amount can be identified and separated by:

Which atoms are primarily present in organic compounds?

Elemental analysis gives elemental composition of living tissues in the form of $P$,while analysis of chemical compounds gives an idea of $Q$ present in living tissues.

The chemical compounds found in cells are mainly classified into which groups?

Select the correct option for the following matches:

Column-$I$	Column-$II$
$(1)$ Water content in a cell	$(a)$ $55-78\%$
$(2)$ Water content in the human body	$(b)$ $70-90\%$
$(3)$ Water content in living organisms	$(c)$ $65\%$