Exam 3 (2008 c)

Exam 3 (2008 c) - Biol 3301 3rd Midterm -Blue December 4th,...

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Biol 3301 3 rd Midterm -Blue December 4 th , 2008 There are a total of 10 pages in this exam. This exam consists of 35 questions worth a total of 100 points. All questions are multiple choice and there is one best answer for each question. Record your answers on the scantron sheet. Answer only once for each question or you will be automatically marked wrong. Use a #2 pencil. Name_________________________ Peoplesoft ID#__________________________
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Question 1: The ty1 transposable element a. transposes by a “cut and paste” mechanism b. is used to transform Drosophila c. transposes through an RNA intermediate d. encodes genes that make a protein capsid e. Question 2: Dissociation is a nonautonomous transposable element because: a. it can not replicate itself b. it does not encode a functional transposase c. it relies on reverse transcriptase to transpose d. it is activated by the breakage-fusion-bridge cycle e. Question 3: When McClintock found that Activator underwent a “changed state” the new state resembled the phenotype of having multiple Ac elements in the same endosperm. The effect of increasing the number of Ac elements in the presence of the chromosome breaking Ds element is: a. An increase in the number of active Ds elements b. A developmental delay in the timing of Ac activity c. Colored Sectors are larger d. Reverse variegation e. None of the above Question 4: Transposable elements dispersed throughout a chromosome can generate genomic rearrangements. Duplications can occur through: a. Intrachromosomal recombination between TEs found in an inverted orientation b. Intrachromosomal recombination between TEs found in the same orientation c. Simultaneous transposition of unlinked elements d. Unequal recombination between elements on sister chromatids e. all of the above Question 5: You have discovered a mutant octopus that has a fleshy proboscis. In breeding studies, you have determined that this neo-nose is encoded by a simple dominant mutation (only one gene). Interestingly, adding more copies of the wild type gene resulted in octopi with noses of three to four nostrils, while placing the mutant over a deficiency reduced the size of the nose and it had only one nostril. This mutation is most likely a: a. Neomorph b. Antimorph c. Hypermorph d. Hypomorph e. Amorph
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Question 6: According to the Luria-Delbruck Fluctuation tests: a. T1 resistant mutations arise as an adaptive response to environmental challenge. b. A decrease in the variance in the number of T1 resistant colonies within the small individual cultures compared to the same number of bacteria in a single large colony indicates adaptive mutations c. An increase in the variance in the number of T1 resistant colonies within the small individual cultures compared to the same number of bacteria in a single large colony indicates adaptive mutations d. An decrease in the variance in the number of T1 resistant colonies within the
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Exam 3 (2008 c) - Biol 3301 3rd Midterm -Blue December 4th,...

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