Cellcycle_lab 2.docx - Click and Learn The Eukaryotic Cell Cycle and Cancer Student Handout THE EUKARYOTIC CELL CYCLE AND CANCER IN DEPTH

Cellcycle_lab 2.docx - Click and Learn The Eukaryotic Cell...

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Student Handout Click and Learn The Eukaryotic Cell Cycle and Cancer THE EUKARYOTIC CELL CYCLE AND CANCER: IN DEPTH PROCEDURE- Follow the instructions as you proceed through the Click and Learn and answer the questions in the spaces below. Click on the “Background” tab on the right side. 1. Compare and contrast the reasons cell division is important for unicellular and multicellular organisms. Unicellular organisms can only reproduce by cell division and multicellular need cell division to grow and replace dead or damaged cells. 2. Provide an example of why cell division remains important to an adult organism even after it is fully developed. Cell division remains important for things such as our gut and skin, these cells are continuously renewed. Broken bones and wounds require other cells to divide in order to heal. 3. What is the role of growth factors? To provide a response to specific molecular signals that trigger cells to divide. 4. Cells divide, differentiate, or die. What is differentiation? Cells divide to produce two identical daughter cells. They differentiate to specialize in structure and function. They die to eliminate unnecessary cells during development and removes unhealthy or damaged cells in the mature organism. 5. What is apoptosis? Explain its purpose. Apoptosis is a form of cell death, a series of molecular steps it eliminates unnecessary cells during development and removes unhealthy or damaged cells in the mature organism, maintains balance in the body. 6. Organisms maintain the right number of cells by regulating the cell cycle. What are “cell cycle regulators?” Molecular signals that may stimulate or halt cell division, instruct cells to differentiate, or initiate cell death. 7. Watch the video clip of cell division in the small intestine. Name the general location along the villus where the following processes occur: Cell Division: Crypt Cell Differentiation: Ascending the Villus Published December 2014 Page 1 of 7
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Student Handout Click and Learn The Eukaryotic Cell Cycle and Cancer Apoptosis: Apex of the Villus 8. Name one harmless result of too little cell division. Hair loss 9. Name one harmless result of too much cell division. Warts or tumors Click on “Cell cycle Phases” in the center purple circle on the right and use the “Overview” information in the window on the left to answer the questions below. 10. List, in order, the four events we collectively call the “cell cycle.” a. Growth (G1) b. DNA replication (S) c. Prepare to divide (G2) d. Division (M) 11. In general, what is the purpose of a checkpoint in the cell cycle? They regulate the progression from one phase of the cell cycle to the next. A safeguard to ensure that the appropriate amount of cells are developing normally at the appropriate rate.
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