question_answer 20)

  Which of the following features is common to prokaryotes and many eukaryotes? (a) Chromatin material present                                 (b) Cell wall present (c) Nuclear membrane present (d) Membrane bound sub-cellular organelles present

Answer:

                  (b) Presence of cell wall is the common feature that is observed in both prokaryotic andsome eukaryotic cells. Cell wall is present in bacteria (prokaryotes) and in plants (eukaryotes) however cell wallis absent in animal cells. Cell wall acts as protection unit for cell and also providesshape to the cell. Cell wall is made up of cellular, hemicellulose or pectins. The genetic material in prokaryotes is naked and not enveloped by nuclear membrane. Chromatin material is present in eukaryotes only. Sub-cellular organelles in prokaryotes are not well defined and are not membranebound while eukaryotes have membranous organelles which are complex structureswith multifunctions.