Cell Division & Cell Cycle Study Guide :: essays research papers

CELL DIVISIONCell division involves 2 phases1- MITOSIS The offshoot by which thermonuclear material is divided 2 similar fille cadres result2- CYTOKINESIS the go by which the cytoplasm and its contents (organelles) separate into suitable parts. cytokinesis begins before mitosis is complete cytokinesis differs in plant and animal jail cadresANIMAL CELLS the carrell membrane pinches near the in-between of the cellular telephone, dividing the cytoplasm into equal parts(2 peeled cells) coiffe CELLS a cell plate develops across the centre of the cell, creating a new cell wall among the 2 new cells Cells alternate between stages (phases) of dividing and not dividing.This sequence is called the cell cycle. The 2 major phases of the CELL troll be1- DIVISION PHASE During this phase the cell undergoes mitosis (nuclear division) There are 4 phases of mitosisProphaseMetaphaseAnaphaseTelophase2- INTERPHASE During this phase, the cell takes in nutrients and builds proteins that a re used by the cell for energy Chromosomes duplicate (DNA replication) This is the period of growth and repair for the cell (in training for the division phase)THE CELL CYCLECELL CYCLE the continuous process of mitosis, cell division, and interphase.HOW CELL GETS READY FOR MITOSIS Nucleus makes a copy of its chromatin(replication) chromatin coils into double stranded chromosomes joined in the middle by a centromere 2 sets of DNA are bundled together nucleus is put for mitosis to begin.Animal cell division cell membrane pinches near the middle of the cell, dividing the cytoplasm into 2 new cellsPlant cell division a cell plate develops across the centre of the cell, forming a new cell wall between the 2 cellsOriginal cell, parent cellNew cells, daughter cells of chromosomes in the nucleus of each cell is identical to eachother and to the number in the original cellWhy must nuclear membrane break down in mitosis?So that the contents of the cell can divide.The NUCLEUS controls the p rocess of mitosis. REGENERATION repair of injured cells or the making of lost body partsNormal Cell permutation cells die when they receive instruction to do so when they are no longer needed