What is the difference between isometric drawing and isometric projection?

Hint :Organic compounds are widely responsible for the sustaining of the life on the earth. Biomolecules found in cells are organic complexes only like D.N.A, proteins, R.N.A, etc. The organic complexes that are essential for the existence of life are not planners in nature. They have some special arrangements which differ in different ways from the observations.

Complete Step By Step Answer:
As the complexes are not planner in nature, they have some special arrangement which differ in different representations. The names of different representations are as follows: - structural formula representation, condensed formula representation, bond line structural formula. Three dimensional representation like we wedge and dash representation, molecular model (ball and stick model). The molecular models include (i) framework model, (ii) ball and stick model, (iii) space filling model.
The organic complexes may be linear, cyclic, may be all in plane or not in plane. Thus the representation is very important. Like the variation leads to difference in properties. For example L-Dopa is a medicine for Parkinson disease while D-Dopa is toxic to organisms.
In isometric view or drawing, the object is shown or viewed in drawing with the actual dimensions with normal scale.
In isometric projections, the plane is placed in such a manner that one can observe all the angles of projections. Here reduced scale is used.

Note :
The organic compounds are very essential for the existence of life, however inorganic materials are used or required for the luxurious life to live like we need ornaments, etc to have a good life. However, the biomolecules are the most essential molecules of life which are usually not planned in nature.