Prokaryotes vs. Eukaryotes âDifferences. Eukaryotes as well as protists, a miscellany group made up of eukaryote-like plant, animal and fungi missing one or more characteristics to be defined as purely eukaryotic, differ greatly from prokaryotes in structure.
It is now clear that prokaryotic cells possess actin and that a dynamic actin-like cytoskeleton is involved in a variety of essential cellular processes in bacteria. These functions, like those of the eukaryotic actin cytoskeleton, require the targeting and accurate positioning of proteins and molecular complexes.he discovery of the prokaryotic homologues of actin (as well as of other cytoskeletal elements in bacteria) has forced a radical rethink about the origin of the cytoskeleton and revolutionized our view of bacterial cell architecture.
BSI Activity Page 3 Actin and Myosin Actin and myosin are the major proteins found in muscle. The interaction of these two proteins,within each sarcomere causes the sarcomere to shorten.Actin is a round protein shaped roughly like a ball.In the sarcomere, many of these actinmolecules are linked together in a long chain to form a filament, called thin filament.Myosin is a long thin protein with a head on it.he activity also covers information on sarcomere structure and the proteinsinvolved in muscle contraction. LEARNING OBJECTIVES â¢ Understand the structure of muscle fibers.â¢ Explore the process of muscle contraction.â¢ Understand the roles that different proteins play in this process.