Presentation on theme: "Bellwork 5.1 Describe the components of the cell theory."— Presentation transcript:
Bellwork 5.1 Describe the components of the cell theory.
Bellwork 5.1 Describe the components of the cell theory. All living organisms are composed of one or more cells. Cells are the smallest unit of living organisms. Cells arise only from previously existing cells
Interphase 5.1 Includes G 1, S and G 2 phases. During this time the genetic material remains as loosely packed chromatin fibers.
Interphase – G 1 Stage 5.1 Cells mature by making more cytoplasm and organelles. Cell carries on its normal metabolic activities.
Interphase - S Stage 5.1 DNA is replicated. Original DNA DNA Two identical copies of DNA
Interphase – G 2 Stage 5.1 Occurs after DNA has been copied. All cell structures needed for cell division are made (ex. Centrioles) Both organelles and proteins are synthesized.
Mitotic Phase 5.1 Split into Mitosis and Cytokinesis. Mitosis – chromatin compacts into chromosomes, which pair up as identical sister chromatids. Cytokinesis – phase which has the actual division of the cell. Produces two genetically identical daughter cells.
DNA Copied Cells Mature Cells prepare for Division Cell Divides into Identical cells Daughte r Cells
In Summary 5.1 Cell size is limited by the plasma membrane’s surface to volume ratio with the cytoplasm. The cell cycle is composed of a mitotic phase and interphase.