MCB 3020C Lecture 1: chapter 5,27 micro test 3
Document Summary
Growth: an orderly increase of all the major chemical constituents of an organism. In crease in total mass does not mean growth since this may be due to an accumulation of cellular reserve material. Growth normally results in cellular multiplication except in the special case of coenocytic (multinucleated) organisms. In a multicellular organism cellular multiplication results in an increase in number or individuals. Growth depends on a large number of chemical reactions: metabolism. Most signi cant are polymerization reactions that make the macromolecules. As these are synthesized and accumulate in cells, they are assembled into cell structures and grows in size and eventually dies. Binary means two cells came from one. Usually involves in equal splitting of material. Cells elongate to twice their length and then form a partition that separates them into two cells. Septum results from invagination of cytoplasmic membrane and cell wall from opposing directions. Fts ( lamentous temperature sensitive) proteins are essential for cell division.
