by • 14/07/2011 • Old Pattern Biology NotesComments (0)463

·       Prokaryotic Cell

  • The organisms made of prokaryotic cells are called prokaryotes e.g. bacteria and cyanobacteria.
  • These cells lack a membrane bound nucleus. The hereditary material (DNA) is found in cytoplasm.
  • These cells lack membrane bound organelles.
  • Ribosomes are of small size in and freely scattered cytoplasm.
  • Cellulose is absent in cell wall, rather it is made up of peptido-glycan or murein.
  • These cells are simple and of smaller size (average diameter 0.5 – 10 nm)

·       Eukaryotic Cell

  • The organisms mae of Eukaryotic cells are called Eukaryotes, e.g. animals, plants fungi and protists.
  • These cells have a membrane bound nucleus; and hereditary material is found inside the nucleus.
  • These cells have membrane bound organelles.
  • Ribosomes are of large size and are present in endoplasmic reticulum free in cytoplasm.
  • Cellulose is present in cell wall of plant cells. The cell wall of most of fungi is composed of chitin.
  • These cells are complex and of larger size (Average diameter 10-100nm)
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