Replication of the DNA is bidirectional, moving away from the origin on both strands of the loop simultaneously. The starting point of replication, the origin, is close to the binding site of the chromosome at the plasma membrane. The bacterial chromosome is attached to the plasma membrane at about the midpoint of the cell. Figure: Binary Fission: These images show the steps of binary fission in prokaryotes. The packing proteins of bacteria are, however, related to the cohesin and condensin proteins involved in the chromosome compaction of eukaryotes. Although the DNA of the nucleoid is associated with proteins that aid in packaging the molecule into a compact size, there are no histone proteins and thus, no nucleosomes in prokaryotes. The single, circular DNA chromosome of bacteria is not enclosed in a nucleus, but instead occupies a specific location, the nucleoid, within the cell. In unicellular organisms, daughter cells are individuals.ĭue to the relative simplicity of the prokaryotes, the cell division process, or binary fission, is a less complicated and much more rapid process than cell division in eukaryotes. In both prokaryotic and eukaryotic cells, the outcome of cell reproduction is a pair of daughter cells that are genetically identical to the parent cell. For unicellular organisms, cell division is the only method used to produce new individuals. Prokaryotes, such as bacteria, propagate by binary fission. Describe the process of binary fission in prokaryotes.
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