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Cell Cycle POGIL StudentWorksheetFa2022

Explore the stages of the cell cycle and what controls cell growth, division, and function. Learn how cells balance size, role, and timing to support life in multicellular organisms.

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    Dann Armani The Cell Cycle What controls the life and development of a cell? Why? An old piece of poetry says "to everything there is a season ...a tune to be bom. a time to die. For cells, the line might say "a time to divide and a time to grow." In multicellular organisms, different types of cells have different roles and need to complete specific tasks. For example, a cell that isn't large enough is not useful for storing nutrients for later, but a cell that is too large will not be useful for transportation through a tiny capillary. In this activity. you will learn about the seasons of a cell's life, and in turn better understand how organisms function. 1. How many phases are in the cell cycle as shown in the diagram in Model 1? 4 ptusBs 2. Starting at the starred cell, what is the order of the stages of a cell's life? G 1 . S . G 2 and than Mrtasls 3. During which phase does the size of the cell increase? G1 phase 4. During which phase does the number of cells increase? Miletic Ei'nisc

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    5. Considering your answer to Questions 3 and 4. identify two ways that the growth of an organ- ism can be accomplished through the events of the cell cycle. The size of the organism will increase as the cells get larger in G1 Furthe p mcfe. [ho nuflMwr ol cHs in an Offlinlim **II in<ro*w as ms coll goes througti nwlcjsis. 6. Cancer, the uncontrolled growth of cells, often results in a tumor, or mass of abnormal cells. Some cancerous tumors consist of many cells that are much smaller than normal. According to Model 1. what parties) of the cell cycle is (are) most likely being affected? G1 is most likely lo be alfedsd ”. In Mode] 1. if the Length of the arrow represents time, then for those cancerous cells, what hap- pens to the time that is necessary for the cell cycle? What implication might this have for doctors who are treating cancer patients? Tbc limo nscossary leu the con cycle wJi decroas* because the cancerous cells are dwdino quicker Thus doctors will have a bardor time trualing cancar putionts. Model 2 - Cell C ycle Data Phase K,, Process Time Interval (hours) SetsofDNA present in each cell at end of phase -KT 1 dumber of organelles in each cell at end of phase Gap 3 Cells are getting larger and oroducin F! more omianelles. 11 1 560 Synthesis □ NA replication Is occurring 8 2 570 Gap , Protein and organelle synthesis 4 2 600 Mitosis ? ■ .' Cell and nuclear splitting 1 1 300 Totals Total time: 24 * 2030 8. Model 2 presents cell cycle data for a typical human cell in culture. Use the phase names in Model 2 to label the G. M. and S phases in Model 1. 9. Locking at the third column of Model 2 : compare the time spent in mitosis with the time spent in gap in human cells and describe any difference. The tme spent in mitosis to< human cells s less than the time spent in gap1. These cells are in mitosis Io* 1/11 hours of [ho lima [hat ihcy arn tn gap 1.

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