Exam 3 Study Guide - 1. Do viruses fit the definition of a...

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1. Do viruses fit the definition of a living organism? No 2. Can a virus replicate by itself? NO 3. What protease (protein that is an enzyme) is absent or found in only small amounts with many people who have cancer? P53 4. What is a benign tumor? Uncontrolled growth with no obvious adverse effects 5. Are oncogenes “good?” Why or why not? Yes it controls cell growth, but if altered can promote or allow uncontrolled growth of cancer 6. What does the term “metastasized” mean? It’s Spreading 7. About 90% of all lung cancer is preventable. True 8. What does the term “carcinogen” mean? Any substance that triggers 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?) Viruses 11. Ultraviolet light can cause skin cancer by damaging the cells’ DNA. What change occurs? Gene Mutation sunlight denatures proteins 12. What are three ways carcinogens get into humans? Inhaled, absorbed through skin, ingested(eaten) 13. What kind of cancer is very common in men, but never occurs in women? Prostate Cancer 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. True 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 >1/4 in. 18. Bacteria are the oldest organisms on Earth. Did the archae or the eubacteria likely gave rise to protistans, fungi, animals and plants? Archae 19. About how fast (on average) do bacteria divide? 20minutes 20. If they divide so fast, why don’t they take over the world? (What limits them?) 21. Can fungi kill bacteria? Can bacteria kill fungi? Yes to both 22. When told to take an antibiotic for 10 days, why is it foolish to stop after only 5 days when you feel better? Not all bacteria is killed off, weak ones die strong ones survive 23. What shape is a coccus bacteria? A spirillum? A bacillus? Coccus=round, bacillus=rod shaped, spirillum=spiral shaped 24. Bacteria are diploid and get one chromosome from each parent. False 25. Do bacteria even have parents? 26.
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Exam 3 Study Guide - 1. Do viruses fit the definition of a...

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