Cellular component refers to the unique, highly organized substances of which
cells, and thus living
organisms, are composed.Cells are the structural and functional units of life. The smallest organisms are composed of only a single cell while the largest are made up of billions of cells. DNA is found in nearly all living cells, however each Cell consists of its own unique DNA sequence in its chromosome. Examples include
membranes,
organelles,
proteins, and
nucleic acids. Whilst the majority of cellular components are located within the cell itself, some may exist in
extracellular areas of an organism.