Biology 1001A Lecture Notes - Lecture 2: Spindle Apparatus, Sister Chromatids, G1 Phase
5 Oct 2016
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8. 2 the cell cycle in prokaryotic organisms. A newly formed prok. cell, such as bacterium, must double in size, rep. its chrom. , and move each of the resulting two chrom. into its own progeny cell during cell division. Binary fission is the entire mechanism of prok. division, that is the splitting/dividing into two parts: this can be thought of in three parts: Period b following birth, cells grow for some time before initiating dna synthesis. Period c once chrom. are rep. and separated to opp. ends of the cell. Period d membrane pinches together bet. them and two daughter cells are formed. 8. 2a rep. occupies most of the cell cycle in rapidly dividing prok. When nutrients are abundant, there is no need for perod b since they can grow quickly enough to divide their cytoplasm as soon as dna rep. is complete and chrom. are separated. 8. 2b rep. chrom. are distributed actively to the halves of the prok.
