Bio Exam #1 (W08)-1 - 1. The two strands of the DNA double...

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1. The two strands of the DNA double helix are held together by: a. ionic bonds b. covalent bonds c. hydrogen bonds e. none of the above 2. During infection of E. coli cells by bacteriophage virus, called T 2 : a. proteins are the only virus component that enter the infected cell b. both proteins and nucleic acids enter the cell c. only protein from the infecting phage can also be detected in progency phage d. more than one infecting phage particle is required to produce infection e. only nucleic acid enter the cell from the virus 3. During mitosis, sister chromatids separate and move to opposite poles during: a. metaphase b. prophase c. synopsis d. telophase e. anaphase 4. DNA replication occurs: a. during G1 b. during the S phase of interphase c. only during mitosis d. only during meiosis e. during G2 5. When dividing cells are examined under a light microscope, chromosomes seem to disappear during: a. metaphase b. anaphase c. prophase d. telophase e. none of the above 6. When dividing cells are examined under a light microscope, chromosomes first become visible during: a. telophase b. metaphase c. prophase d. anaphase e. G1 7. In sexually reproducing organisms, the diploid phase of the life cycle begins at: a. spore formation b. gamete formation c. fertilization of the egg d. meiosis e. mitosis
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8. The diagnosis of Down Syndrome can be made by examining the individual’s: a. spores b. pollen c. nucleosomes d. kinetochores e. karyotype 9. During meiosis, the sister chromatids separate and move to opposite poles during: a. anaphase I b. anaphase II c. meiosis I d. metaphase e. telophase II 10. The exchange of genetic material between chromatids on homologous chromosomes occurs during: a. interphase c. prophase II d. prophase I e. anaphase II 11. The number of chromosomes is reduced to half during: a. anaphase of mitosis b. anaphase I of meiosis c. anaphase II or meiosis d. fertilization e. interphase 12. Which is true of mitosis: a. The chromosome number in the resulting cells is halved b. DNA replication is completed in prophase c. Crossing over occurs during phrophase d. It consists of two nuclear divisions e. Two genetically identical nuclei are formed 13. A person with Klinefelter Syndrome has 44 non-sex chromosomes and 3 sex chromosomes (XXY). The resulting aneupolidy is caused by _______ during meiosis: a. crossing over
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This note was uploaded on 04/09/2008 for the course BIOL 102 taught by Professor Conover during the Winter '08 term at University of Cincinnati.

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Bio Exam #1 (W08)-1 - 1. The two strands of the DNA double...

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