old exam #2

old exam #2 - Genetics and Cellular Biology (Biol 204) EXAM...

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Genetics and Cellular Biology (Biol 204) Name _______________________________ EXAM TWO March 2, 2007 Each question is worth 2 points. Circle the letter that indicates the best answer. a) b) c) d) Chapter 8 H282. Which of these are NOT principal steps in "gene expression"? a) Transcription b) RNA processing c) Translation d) DNA replication H286. RNA polymerase binds to DNA wherever the DNA has a particular base sequence called a(n): a) Shine-Dalgarno sequence. b) origin of replication. c) promoter. d) enhancer. H286. In eukaryotes, transcription of mRNAs is mediated by: a) RNA polymerase I b) RNA polymerase II c) RNA polymerase III d) RNA polymerase IV H286. Any generalized base sequence based upon the comparison of many closely related sequences in different locations in a genome or even among various different organisms is called a: a) promoter. b) consensus sequence. c) TATA box. d) enhancer. H286. Any generalized base sequence based upon the comparison of many closely related sequences in different locations in a genome or even among various different organisms is called a _____ consensus _____ sequence. H286. Of the two consensus sequences that are found in E. coli, the __ TATA ___ __ box _ is similar in sequence and position to what is found in eukaryotes. H289. What do you call the region of the mRNA from the start codon to the stop codon? a) Exon b) Intron c) ORF d) Consensus sequence H289. Between the 5' untranslated region and the 3' untranslated region of an mRNA is a(n) ___ open ______ ______ reading _____ _____ frame _____. H289. In the nucleus, hnRNA undergoes chemical modification that causes it to become mature mRNA. This process is called : a) RNA processing. b) transcription. c) translation. 1
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d) transformation. H290. Which of these is NOT a component of RNA spicing? a) Splice donor b) Splice acceptor c) TATA box d) Lariat structure H290. In eukaryotic translation, the initiation complex assembles at what position on the mRNA? ___ 5’ cap ______ H290. In eukaryotic gene expression, what does a primary transcript possess that the mRNA does not? a) introns b) exons c) cap d) poly-A tail H290. In eukaryotes, what are the three main steps in processing the primary transcript in order to produce a mature mRNA? Add cap; splice out introns; add poly-A tails. H291. Spliceosomes are abundant small nuclear particles composed of proteins and several small-specialized RNA molecules. Because of the unusual nature of these particles, they are also called: a) aminoacylated tRNAs b) polysomes c) SINE elements d) snRNPs H293. Exon shuffle refers to a theoretical model for: a) splicing out introns of mRNAs using ribozymes. b) differentiation of V and J regions of IgG in B cells. c)
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old exam #2 - Genetics and Cellular Biology (Biol 204) EXAM...

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