Exam 3 Study Guide - ISB 202 Exam 3 Study Questions 1. Do...

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ISB 202 Exam 3 Study Questions 1. Do viruses fit the definition of a living organism? no 2. Can a virus replicate by itself? no they need a host cell 3. What protease (protein that is an enzyme) is absent or found in only small amounts with many people who have cancer? 4. What is a benign tumor? uncontrolled growth with no obvious adverse affects 5. Are oncogenes “good?” Why or why not? no they promote cell division 6. What does the term “metastasized” mean? cancerous cells that spread 7. About 90% of all lung cancer is preventable. True or False ??90% of deaths were caused by smoking 8. What does the term “carcinogen” mean? things that may cause cancer 9. What is the most common form of cancer in humans in the U.S.? skin cancer 10. What can cause diseases AND also cancer? (Is it an organism?) 11. Ultraviolet light can cause skin cancer by damaging the cells’ DNA. What change occurs? denatures proteins - causes bases to pair adjacently instead of to their normal base pair they will pair thymine to thymine and cause mutations 12. What are three ways carcinogens get into humans? inhaled, absorbed, ingested 13. What kind of cancer is very common in men, but never occurs in women? prostate 14. Can men get breast cancer? yes 15. Smoking is responsible for about 30% of all cancers in the U.S. TRUE!! 16. Carcinogens are found in tiny amounts all around us, including many of our food. T or F 17. A fast-growing “mole” on your skin should be checked out immediately, especially if it shows what four characteristics (ABCD)? asymmetrical, border irregular, color uneven, diameter, evolving 18. Bacteria are the oldest organisms on Earth. Did the archae or the eubacteria likely gave rise to protistans, fungi, animals and plants? archaebacteria 19. About how fast (on average) do bacteria divide?
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20 mins 20. If they divide so fast, why don’t they take over the world? (What limits them?) run out of resources an die, their own waste ruins the environment and some viruses kill them 21. Can fungi kill bacteria? Can bacteria kill fungi? yes, no 22. When told to take an antibiotic for 10 days, why is it foolish to stop after only 5 days when you feel better? yes because the weak bacteria cells might have died but the stronger ones are still there 23. What shape is a coccus bacteria? round (sphere) ex) staph A spirillum? spiral A bacillus? rod-shaped 24. Bacteria are diploid and get one chromosome from each parent. True or False F only one chromosome because no parents (asexual reproduction) 25. Do bacteria even have parents? no 26. As a group, bacteria have very diverse ways of getting nutrition for themselves. True or False T 27. Bacteria are a problem mostly when they become a colony of millions (as opposed to just a single individual). True or False T 28. What are the two main types of structures that bacteria may have to help them move about? Some have flagella (tails) that wiggle and help them move about while others have cilia (hair-
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This note was uploaded on 11/17/2011 for the course ISB 202 taught by Professor Johnson during the Fall '08 term at Michigan State University.

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Exam 3 Study Guide - ISB 202 Exam 3 Study Questions 1. Do...

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