LIFE SCIENCE

Detailed explanation-1: -It is convenient to consider the structures of the body in terms of fundamental levels of organization that increase in complexity: subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms and biosphere (Figure 1).

Detailed explanation-2: -It is common practice to describe structure at a series of hierarchical levels, called primary, secondary, tertiary, and quaternary structure. This hierarchy reflects some of the types of information provided by particular experimental techniques used to determine the structures of biological molecules.