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Biology Cell Class Project

Prokaryotic Cells, Eukaryotic Cells, and Viruses

Home
A-Semipermeable Membranes
B-Enzymes
C- Cells and Viruses
D- Molecular Biology
E- E.R. and Golgo Appartus
F- Photosynthesis
G- Mitochondria
H- Macromolecules
I- Chemiosmotic gradients
J- Shape and Forms of Eukaryotic Cells
Bibliography

Students know how prokaryotic cells, eukaryotic cells, and viruses differ in complexity and gerneral structure

Prokaryotic Cells

Prokaryotic cells have no membrane (bound nucleus), and many other cell parts that the eukaryotic cell has, and are unicellular.  They can come in a number of shapes though, such as: spherical (coccus), rods (bacillus), or curved (vibriospirillum, or spirochete.) These cells are bacteria and are used in medicines, foods, and chemicals.  They are smaller than eukaryotic cells and are less complex. Prokaryotic cells consists of a plasma membrane, cell wall, and ribosomes.

Eukaryotic Cells

Eukaryotic cells are more complex and are bigger than Prokaryotic cells. They consist of a plasma membrane, cell wall, ribosomes, chloroplasts, a cytoskeleton, an E.R., a golgi appartatus, lysosome, mitochondria, nucleus, and vacuoles.  Lysosomes are only present in some eurkaryotic cells.  While prokaryotic cells have DNA that is single-stranded eurkaryotic cells have double-stranded DNA that lives inside the nucleus.  Plants and animal eurkayotic cells are very similar but they have their differences. For instance a plant cell has one large vacoule while some animal cells may contain smaller vacoules in them. Plants cells are the only ones that contains a cell wall and chloroplasts too. Animals cells have centroles and plant cells do not; also animals cells also contains small lysosomes.

Viruses

Viruses are not alive but they do consist have some characteristics of a living organism.  They are really small, relatively simpleand are composed of nucleic acids enclosed in a protein coat.  Viruses are considered not alive because they can not grow, develope or carry out respiration.  They are able to make copies of themselves with the help of living cells though.  Viruses do have an inner core of nucleic acid which is either RNA or DNA where the instructions to duplicate the virus is at.  Their outter protein coat is called a capsid.

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