Cell growth and division



One of the key features that separates life from non-life is:Do all cells have the ability to reproduce?How do unicellular organisms reproduce?What is cell division needed for in multicellular organisms? Define asexual reproduction –The offspring produced are __________________________.What are the four benefits of reproducing asexually? Who can reproduce asexually?Define sexual reproduction – What is the benefit of sexual reproduction?Who can reproduce sexually?Define genome – DNA molecules in a cell are packaged into _________________________.Chromosomes What is the purpose of chromosomes?Every cell must ____________________________________ before cell division.Each new daughter cell gets _____________________________________________.Cells of every organism have ____________________________________________.Prokaryotic cells lack _________________.Where is their DNA?What form does their chromosome take?Draw a picture of a prokaryotic cell with chromosome below:In eukaryotic cells, chromosomes are located in the _________________ and are made of ___________________.What is chromatin made of?What are nucleosomes?What are chromosomes made of?What must happen to prepare for cell division?Each duplicated chromosome forms ___________________________________.What is the centromere?Phases of the Cell CycleThe cell cycle consists of:The Mitotic (M) Phase –Interphase –List the three parts of interphase: Label this diagram: What happens in the G1 phase?What happens in the S phase? What happens in the G2 phase?Describe the two phases of cell division in eukaryotes:Mitosis –Cytokinesis – Define each of these important structures in mitosis:Chromatid –Centromere –Centrioles –Spindle –Fill in this table for the different stages of mitosis:Stage of MitosisWhat Happens?What Does it Look Like?Interphase2324114635500Prophase2324107429500Metaphase2990858826500Anaphase2990855905500Telophase2990855842000 What is cytokinesis?Describe how cytokinesis occurs in animal cells:Why does the process have to be different in plant cells?What forms instead in plant cells?Binary Fission Prokaryotes reproduce by a type of cell division called _________________________.What happens during binary fission? The events of the cell cycle are controlled by a _____________________________________.The control system has specific _________________________ where the cell cycle _______________ until a ______________________ is received.Name the three cell cycle checkpoints: Which checkpoint is the most important?What happens if the cell receives a go-ahead signal at this checkpoint?What happens if the cell does not receive a go-ahead signal?Describe the two examples of cell growth control: Density-dependent inhibition:Anchorage dependence: What goes wrong with cancer cells?What are tumors?What makes a tumor benign?What makes a tumor malignant? ................
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