Exam 3 (2008 d) - Biol 3301 3rd Midterm -Pink December 4th,...

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Biol 3301 3 rd Midterm -Pink 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: Activator is an autonomous transposable element because: a. can not replicate itself b. it encode a functional transposase c. it encodes a functional reverse transcriptase 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. Reverse variegation c. A developmental delay in the timing of Ac activity d. Colored Sectors are larger 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 in an inverted orientation b. Intrachromosomal recombination between TEs 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 an aardvark that is immune to infection by the distemper virus. Your first hypothesis that the immunity came from the aardvark’s diet (an excess of antie-bodies) turns out to be incorrect. The immunity is actually due to a recessive mutation. When the mutation is placed in trans over a large chromosomal deficiency, the resistance is even greater. 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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This note was uploaded on 12/02/2011 for the course BIOL 3301 taught by Professor Gunaratne during the Spring '05 term at University of Houston.

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Exam 3 (2008 d) - Biol 3301 3rd Midterm -Pink December 4th,...

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