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Cell Growth




When used in the context of reproduction of living Cells the phrase "cell growth" is shorthand for the idea of "growth in cell Populations by means of cell reproduction." During cell Reproduction one cell (the "mother" cell) divides to produce two Daughter Cell s.


CELL POPULATIONS

Cell populations go through a type of Exponential Growth called doubling. Thus, each Generation of cells should be twice as numerous as the previous generation. However, as noted by Richard Dawkins (1997), this view is naive as the number of generations only gives a maximum figure. This is due to the fact that not all cells survive in each generation.


CELL SIZE



Yeast cell size regulation

The relationship between cell size and . It normally Phosphorylates the Cdc2 cell cycle regulatory protein (cyclin-dependent kinase-1, CDK1 ) on a Tyrosine residue. This Covalent modification of the molecular structure of Cdc2 inhibits the enzymatic activity of Cdc2 and prevents cell division. In Wee1 mutants, there is less Wee1 activity and Cdc2 becomes active in smaller cells, causing cell division before the yeast cells reach their normal size. Cell division may be regulated in part by dilution of Wee1 protein in cells as they grow larger.


Cell size regulation in mammals

The protein MTOR is a serine/threonine Kinase that regulates
Translation and cell divisionDownload full text PDF :
"[http://www.ncbi.nlm.nih.gov/entrez/utils/lofref.fcgi?PrId=3036&uid=16100767&db=pubmed&url=http://www.cmj.hr/2005/46/4/16100767.pdf
Deregulation of cell growth and malignant transformation]" by Sanda
Sulic, Linda Dikic, Ivan Dikic and Sinisa Volarevic in ''Croatian