Biology 1201A Chapter Notes -Cell Membrane, Prokaryote, Centrosome
Document Summary
What do all cells require to survive: a complete set of genetic instruction. Genetic instruction is coded in the dna of the cell: produce required molecules, direct life process. Why do cells divide: growth, repair, development. Activities of a cell from one cell division to the next: cell grow, adding more cytoplasmic constituents, dna is replicated, cell divides into 2 identical daughter cells. Transmit a complete copy of genetic information (dna) Transmit materials necessary for cell to survive and use genetic information. Chromosomes are replicated: replicated chromosomes attach to plasma membrane at a different nearby point. Cell elongates: new plasma membrane is added between chromosomes, pushing them towards opposite ends of the cell. Plasma membrane grows inward at middle of cell. Parent cell is divided into 2 identical daughter cells. Membrane- bound organelles including nucleus: dna contained in nucleus. Cell division of somatic cells is called mitotic cell division. Contains almost all genetic information: mitosis only deals with nuclear chromosomes.