Similarities And Differences Between Eukaryotic And Prokaryotic Cells
Cell Theory – The Cell Theory describes the properties of cells; cells are the basic unit of reproduction in all organisms and correspondingly the basic unit of structure.
The Cell Theory states:
• All living organisms are composed of cells; they may be unicellular or multicellular.
• The cell is the basic unit of life
• Cells arise from pre-existing cells
The modern version of the Cell Theory includes the ideas that:
• Energy flow occurs within cells
• Heredity information (DNA) is passed on from cell to cell
• All cells have the same basic chemical composition
Prokaryotic and Eukaryotic Cells
Prokaryotes are organisms without a cell nucleus, or any other membrane-bound organelles. The majority of Prokaryotic Cells are unicellular, while some prokaryotes are multicellular.
Eukaryotes are organisms whose cells are organized into complex structures by internal membranes and a cytoskeleton. The most characteristic membrane bound structure is the nucleus.
Similarities and Differences between Eukaryotic and Prokaryotic Cells Eukaryotic Cell Prokaryotic Cell
Nucleus Present Absent
Cell Type Usually multicellular Usually unicellular (some cyanobacteria may be multicellular)
True Membrane bound Nucleus Present Absent
Example Animals and Plants Bacteria and Archaea
Lysosomes and peroxisomes Present Absent
Microtubules Present Absent or rare
Endoplasmic reticulum Present Absent
Mitochondria Present Absent
Cytoskeleton Present May be absent