BIOL 2051 Lecture Notes - Lecture 2: Chlamydomonas Reinhardtii, D-Value (Microbiology), Exponential Growth

• School: LSU
• Department: Biological Sciences
• Course: BIOL 2051
• Professor: Ginger Brininstool

Document Summary

Growth increase in the number of cells. Polar growth without differentiation of cell size. Growth of most microorganisms occurs by the process of binary fission. Cell elongation septum formation completion of septum; formation of walls; cell separation. For cell division: dna replication, formation of divisome, cell elongation. In bacteria, like e. coli, the type ii topoisomerase involved in relaxing the dna helix is named dna gyrase: dna replication. Blue arrows indicate direction of synthesis of new strand on each parent strand. The rate of elongation is about 500 nucleotides per second in bacteria and 50 per second in human cells. Topoisomerase iv is responsible for unlinking the replicated circular chromosomes. Circular chromosomes have ter sites across from the origin of replication are recognized by tus proteins that block progress of the replication fork: ter sites are sequences in the dna where the tus proteins bind.