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Unformatted text preview: -1-BIOS 100 - Fall, 2005Name:Exam II, 14 October, 2005Michael Muller, InstructorTA:This exam consists of 55 questions over 6 pages. Please check to see that all the pages are present beforeyou begin. Use a #2 pencil and bubble in all answers. Your score will be posted on the UIC Blackboardsite as soon as they are in. The answer to question 26 is C. No kidding. Why dont you guys believe me? I am getting a little offended - I work hard to make these instructions and no one reads them. Good Luck! Matching of a sorts - use the diagrams below of 2n=6 cells to answer questions 1-5.IIIIIIIVVVI1. Which of the cells pictured above are in Metaphase I?A. IB. IIC. IIID. IVE. V2. Which of the cells pictured above is crossing over taking place?A. IIB. IIIC. IVD. VE. VI3. Which of the above pictured cells are in any stage of Meiosis I?A. IIIB. IVC. III, IVD. III, IV, VIE. None of the above4. Which of the cells pictured above are in anaphase of mitosis?A. IIB. IIIC. IVD. VE. None of the above5. How many of the above cells are in a stage of meiosis?A. 2B. 3C. 4D. 5E. 66. During which stage of the cell cycle are cyclin levels the greatest?A. G0B. G1C. SD. ME. S & M7. Cancer cells do not exhibit contact inhibitionA. TrueB. False-2-8. Which of the following statements (A-D) about cancer and genes is FALSE? If statements A-D aretrue, then choose E. A. Healthy cells contain functional proto-oncogenes and tumor supressor genesB. Proto-oncogenes speed up cell divisionC. Tumor supressor genes slow down cell divisionD. If either of these types of genes becomes damaged, it can become a cancer-causing geneE. All of the above statements about cancer and genes are TRUE9. When do homologous chromosomes separate during meiosis?A. Metaphase IB. Anaphase I C. Metaphase IID. Anaphase IIE. None of the above10 During which stage of the cell cycle is helicase most active?A. G0B. G1C. G2D. SE. None of the above11. When do sister chromatids separate during meiosis?A. Metaphase IB. Anaphase I C. Metaphase IID. Anaphase IIE. None of the above12. Which of the following statements (A-D) about chromosomes is FALSE. If answers A-D are true,then choose E.A. Chromosomes are composed primarily of DNA and proteinB. Sister chromatids are joined at the centromereC A human male has two homologous X chromosomes (X chromosome = chromosome 23)D. During mitosis and meiosis, the spindle fibers attach to the kinetochore region of thecentromereE. All of the above statements are TRUE13. When do homologous chromosomes separate during mitosis?...
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