PPT-The Cell Cycle Unit 1 – Cells and Proteins

Advanced Higher Biology Miss Aitken The Cell Cycle Mitosis is the process of cell division Some cells are able to reproduce and make copies of themselves by following this sequence of events The cell cycle consists of 2 phases interphase not dividing and mitosis dividing. Denition :Anr-cycleisdenotedby(i1i2:::ir):Example :11=(1)1cycle1212=(1)1cycle1221=(12)2cycle123321=(13)2cycle123231=(123)3cycle12344312=(1423)4cycle1234535421=(13425)5cycle12345 Why do cells need to divide?. Growth and development. You started as 1 cell and now you’re made up of roughly 40 TRILLION cells. Repair and regeneration of tissue. Reproduction. What happens when cells divide? . Unicellular organism- cell division reproduces . an entire . organism. Multicellular. organisms- cell . division . can . produce . growth or progeny. Cell . division functions in reproduction, growth, and repair. You Must Know. Ways that the cell cycle is regulated.. Ways in which the normal cell cycle is disrupted to cause cancer. . Concept 9.3: The eukaryotic cell cycle is regulated by a molecular control system. Topic 1: DNA Organization. By the end of this topic, you should be able to…. Identify parts of a chromosome. Explain why DNA has to copy and coil before cell division. Explain why cells cannot continue to grow forever. Focus on Integrins. John Cooper. Dept of Biochemistry & Molecular Biophysics. www.cooperlab.wustl.edu. jacooper@wustl.edu. November 19, 2019. Goals of lecture. Context: Cell adhesion and ECM molecules. Ms. McCabe. Do Now Cells Quiz 20 Points. Skipping lines, number 1-10. Name, Date, Period. The title is: . Cell Quiz. Answer 1-5 in complete sentences. For 6-10, write the word . and. the matching definition. Phases of the cell cycle. Interphase. Mitotic Phase. Interphase. G1. - a cell grows and develops. S. - a cell continues to grow but copies its DNA. G2. - still growing but begins to store energy and get ready to divide. Intercellular Signaling—Local . Cell Junctions—signaling substances in cytosol pass freely between cells. Gap Junctions in Animals. Plasmodesmata. in Plants. Cell-Cell Interaction. —. interaction . The cell cycle, or cell-division cycle, is the series of events that takes place in a cell leading to its division and duplication (replication). . In cells without a nucleus (prokaryotes), the cell cycle occurs via a process termed . Chapters 12, 13, 16, 17. Limits to Cell Growth. The larger a cell becomes, the more demands a cell places on its DNA. If extra copies of DNA are not made, an “information crisis” would occur. The cell also has more trouble moving nutrients and wastes across the cell membrane. Biocompatibility and Cellular Overview Part 2. Outline . Biocompatibility. Quick overview of cellular interaction. Scale, size, generic animal cell. Nanoscale materials . for biological interaction. Liposomes. 7/22/2009 Cells divide to increase their numbers through a process of mitosis, which results in two daughter cells with identical sets of chromosomes. As you grow from an infant to an adult, you pass Variation of length of cell cycle. In humans, the frequency of cell turnover . varies. E. arly embryonic development. (Few hours ). E. pithelial cells (2-5 days). Specialized cells. (. cortical neurons or cardiac muscle cells.