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Exam I 2004 - BIG 321 Cell Biology EXAM I Fall 2004 Name 1...

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'- BIG 321 Cell Biology EXAM I Fall 2004 1. Which of the following is not a characteristic of all prokaryotic and eukaryoticcells? a. DNA is the hereditary material b. A lipid bilayer cell membrane c. Ribosomes read mRNA to make proteins < d. DNA is housed in a membrane bound nucleus e. All of the above arecharacteristics of all cells 2. New genes come ITompreexisting genes. The formation of a hybrid gene that contains parts of two ancestral genes that were distinct is referred to as: a. Intragenic mutation b. Gene duplication c. DNA segment shuffling ~ d.' Horizontaltransfer e. All of the above are possible 3. What is meant by the term, "vertical transfer" of genetic information? ~a. Parental passage of genes to offspring b. Viral transfer of genes c. Passage of genes from stem cells to daughter cells d. Point mutations in a stem cell 4. If there is a speciation eventthat causes one species to diverge into two different species, a gene that has . the same general function in the two new species is referred to as: "\.d. paralogous 5. Gene duplications within an organism may produce duplications of a gene and the duplicate genes may take on distinct functions. These genes are referred to as: - c. orthologous Name 6. In the example used in class, all globin genes from Drosophila to human are considered to be: - e. ambivalent 7. One proposal is that eukaryotic cells originated as predatory organisms. Which property below is not a characteristic that is unique to eukaryotes (Le., Which can also be found in prokaryotes)? a. Complex set of cytoskeletal elements b. Protective nuclearmembrane ,c. Large flexible cells d. Move by coordinated beating of cilia 8. During the symbiotic relationship that developed between an ancestral eukaryotic cell and a bacterium, important portions of the bacterial genome were relocated to the host cell nucleus. a. true - b. false 9. Noncoding DNA in eukaryotic cells is a much larger percentage of the total genome than noncoding DNA is in bacteria. 'a. true b. false
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