ch13_review - Klug, Concepts of Genetics 8/e Chapter 13...

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Klug, Concepts of Genetics 8/e Chapter 13 MEDIA REVIEW QUESTIONS 1. Both the codons UUU and UUC specify the amino acid phenylalanine. What is the  term for this phenomenon? a. Nonoverlapping b. Degenerate c.Universal d. Unambiguous 2. Which of the following experiments or discoveries did  not  help to identify the "triplet  nature" of the DNA code? a. Frameshift mutations b. Anticodons c.RNA homopolymers d. Universality of the genetic code 3. How many different codons code for an amino acid? a. 61 b. 64 c.20 d. 3 4. The wobble hypothesis involves a. tRNA b. mRNA c.Both mRNA and rRNA d. Both mRNA and tRNA 5. In prokaryotes, the initial amino acid in a polypeptide chain is the modified form of  methionine, N-formylmethionine, or f-met. Which term describes the codon for f- met? a. Nonsense codon b. Suppression codon c.Initiator codon d. Termination codon 6. RNA synthesis from a DNA template is called a. Transformation
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b. Transduction c.Transcription d. Translation 7. Which subunit of RNA polymerase establishes template binding to a promoter in  prokaryotes? a. Beta prime b. Alpha c.Sigma d. Beta 8. Where does transcription in prokaryotes end? a. A gene's stop codon b. A region beyond the end of one or more tandem genes c.A region called the TATA box d. A region at the head of every gene 9. Which RNA polymerase transcribes protein-coding genes into mRNA in  eukaryotes? a. RNA polymerase I b. RNA polymerase II c.RNA polymerase III d. RNA polymerase IV 10. Which of the following statements about the effects of enhancers and transcription  factors (TFs) on gene expression is true? a. Both are  cis -acting. b. Both are  trans -acting. c.Enhancers are  trans -acting, TFs are  cis -acting. d. Enhancers are  cis -acting, TFs are  trans -acting. 11. What are the two main types of posttranscriptional modifications that take place in  the mRNA of eukaryotes? a. The addition of a poly-T sequence at the 5' end of the gene and the addition of  a poly-U tail at the 3' end. b. The addition of a 7-mG cap at the 5' end of the transcript and the addition of a  poly-A sequence at the 3' end of the message. c.The addition of a poly-A sequence at the 5' end and the addition of a 7-mG cap  at the 3' end of the RNA transcript.
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d. The excision of the introns and the addition of a 7-mG cap to the 3' end. 12. Which of the following does  not  involve introns? a. Alternative splicing b. Ribozymes c.Intervening sequences d. Antisense oligonucleotides 13. Which mRNA sequence is transcribed from the DNA template strand  TACGGGATT? a.
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This test prep was uploaded on 04/06/2008 for the course BIOL 313 taught by Professor Vollbrecht during the Spring '08 term at Iowa State.

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ch13_review - Klug, Concepts of Genetics 8/e Chapter 13...

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