Search results
Results from the WOW.Com Content Network
The life cycle of lambda phages is controlled by cI and Cro proteins. The lambda phage will remain in the lysogenic state if cI proteins predominate, but will be transformed into the lytic cycle if cro proteins predominate. The cI dimer may bind to any of three operators, O R 1, O R 2, and O R 3, in the order O R 1 > O R 2 > O R 3.
In the lambda phage, it is specifically E. coli. The wild type, having a temperate life cycle, allows the virus to exist in 2 life cycle stages, A lysogeny, and a lytic stage. During these life cycles it destroys the cell through the process of lysis, during the lysis process the offspring of the virus are released from the burst cell.
Fitness of a plasmid is determined by its mobility. The first factor of plasmid fitness is its ability to replicate DNA. The second fitness factor is a plasmid's ability to horizontally transfer. Plasmids during their cycle carry genes from one organism to another through a process called conjugation. Plasmids usually contain a set of mobility ...
The simplest DNA end of a double stranded molecule is called a blunt end. Blunt ends are also known as non-cohesive ends. In a blunt-ended molecule, both strands terminate in a base pair. Blunt ends are not always desired in biotechnology since when using a DNA ligase to join two molecules into one, the yield is significantly lower with blunt ...
The eukaryotic cell cycle consists of four distinct phases: G 1 phase, S phase (synthesis), G 2 phase (collectively known as interphase) and M phase (mitosis and cytokinesis). M phase is itself composed of two tightly coupled processes: mitosis, in which the cell's nucleus divides, and cytokinesis, in which the cell's cytoplasm and cell membrane divides forming two daughter cells.
Sister chromatid cohesion refers to the process by which sister chromatids are paired and held together during certain phases of the cell cycle. Establishment of sister chromatid cohesion is the process by which chromatin -associated cohesin protein becomes competent to physically bind together the sister chromatids.
Then the two daughter cells separate, and a new round of the cell cycle freshly starts in each one, at the stage of G0. When cells are ready to divide, because cell size is big enough or because they receive the appropriate stimulus, [ 45 ] they activate the mechanism to enter into the G1 stage of cell cycle, and they duplicate most organelles ...
Eukaryogenesis, the process which created the eukaryotic cell and lineage, is a milestone in the evolution of life, since eukaryotes include all complex cells and almost all multicellular organisms. The process is widely agreed to have involved symbiogenesis , in which an archeon and a bacterium came together to create the first eukaryotic ...