Exam 3 (2008 a)

Exam 3 (2008 a) - Biol 3301 3rd Midterm -Yellow December...

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Biol 3301 3 rd Midterm -Yellow December 4 th , 2008 There are a total of 11 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 human L1 element a. transposes by a “cut and paste” mechanism a. is used to transform Drosophila b. transposes through an RNA intermediate c. encode a gene that make a reverse transcriptase d. Question 2: McClintock demonstrated that the Activator element could regulate the activity of Dissociation in trans. The reason Activator can do this is: a. Activator can transpose to the same chromosome as Dissociation b. Activator encodes a reverse transcriptase which converts the Dissociation message back into DNA c. Activator undergoes self regulation d. Activator contains a gene for the transposase enzyme, which diffuses and can act freely in the nucleus e. None of the above 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. Inversions 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 a mutant venus fly trap that can grown large enough to eat 100 kg animals. After loosing a few graduate assistants, you find that this mutant phenotype is due to a single dominant mutation. When you add more wild type copies of the gene, the plant gets even bigger. When you remove the remaining wild type copy of the gene, the plant gets smaller. This mutation is most likely a: a. Neomorph a. Antimorph b. Hypermorph c. Hypomorph d. Amorph
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Question 6: When Ester Lederberg applied the technique of replica plating to directly test the ability of adaptive mutations to arise as a result of environmental challenge: a. The same colonies consistently gave rise to T1 resistant colonies when plated on T1 containing plates b. Independent colonies would give rise to T1 resistant colonies when replica
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Exam 3 (2008 a) - Biol 3301 3rd Midterm -Yellow December...

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