f08 bio202 mt4 version1

f08 bio202 mt4 version1 - Exam...

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Unformatted text preview: Exam Name___________________________________ MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1 Plants are more readily manipulat ed by genetic engineeri ng than are animals because 1) _____ plant genes do not contain introns. plant cells have larger nuclei. genes can be inserted into plant cells by microinjection. more vectors are available for transferring recombinant DNA into plant cells. a somatic plant cell can often give rise to a complete plant. Use the following information to help you answer the following questions . Multigene families include two or more nearly identical genes or genes sharing nearly identical sequences. A classical example is the set of genes for globin molecules, including genes on human chromosomes 11 and 16. Several of the different globin genes are expressed in humans, but at different stages of developm ent. What mechanis m could allow for this? 2) _____ exon shuffling pseudogene activation differential translation of mRNAs intron activation developmental stage-specific gene expression. What is it that can be duplicate d in a genome? 3) _____ entire chromosomes only entire sets of chromosomes only DNA sequences below a minimal size only DNA sequences above a minimum size only sequences, chromosomes, or sets of chromosomes What are prions? 4) _____ tiny molecules of RNA that infect plants viral DNA that has had to attach itself to the host genome misfolded versions of normal proteins viruses that invade bacteria a mobile segment of DNA Which of the following separates molecule s by movemen t due to size and electrical charge? 5) _____ DNA ligation restriction enzyme digestion in situ hybridization PCR gel electrophoresis A researcher has arrived at a method to prevent gene expression from Drosophila embryonic genes. The following questions assume that he is using this method. The researche r measures the concentra tion of the polypepti des from different regions in the early embryo and finds the following pattern (darker shading = greater concentra tion): Which of the following would be his most logical assumpti on? 6) _____ The substance must have entered the embryo from the environment near region 1. The cytosol is in constant movement, dispersing the polypeptide. The substance is produced in region 1 and diffuses toward region 5. Some other material in the embryo is causing accumulation in region 1 due to differential binding. The substance has moved quickly from region 5 to region 1. Why is cancer more prevalent in older people? 7)...
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f08 bio202 mt4 version1 - Exam...

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