202pracexam3ans

202pracexam3ans - Biology 202 Exam 3 Fall 2006 MATCHING...

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Biology 202 Exam 3 Fall 2006 MATCHING: Match the definition with the correct term. 2 pts 1. __D__ Describes gene expression in which genes are being transcribed all the time 2. __R__ Transfer of DNA between bacterial cells that is mediated by a virus 3. __N__ Describes a single mRNA transcript containing two or more adjacent protein- coding genes 4. __M__ Ribosomal site that contains a tRNA linked to a growing chain of amino acids 5. __F__ Type of cell in which an F factor has been excised from the Hfr chromosome and re-circularized into an F plasmid 6. __L__ Phage life cycle in which the phage takes over the bacterium and uses it to express the phage’s genes and to produce progeny phages 7. __C__ DNA library that represents expressed genes 8. __E__ A small molecule involved in controlling expression of many regulated genes 9. __Q__ Phage that can undergo both the lytic and lysogenic cycles 10. __A__ mRNA structure responsible for ribosome recognition a. 5’ cap g. F+ cell m. P site s. transformation b. A site h. F- cell n. polycistronic c. cDNA library i. genomic library o. regulated d. constitutive j. intron p. repressor e. effector k. lysogenic cycle q. temperate f. F’ cell l. lytic cycle r. transduction MULTIPLE CHOICE: Select the best answer from the answers provided. Choose only one answer. 2 pts 1. What is the product of the lacI gene? a. lactose b. tryptophan c. B-galactosidase d. repressor e. CAP protein
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2. Your bone cells, muscle cells, and skin cells perform different functions because a. each cell contains different kinds of genes. b. they are present in different organs. c. different genes are active in each kind of cell. d. they contain different numbers of genes. e. each cell has different mutations. 3. Under normal conditions in wild type E. coli , the lac operon is under ________ control. a. positive b. negative c. inducible d. both B and C e. all of the above 4. During transcription of the trp operon, pairing of regions 2 and 3 in the leader peptide mRNA creates a(n) ______ signal. a. pause b. termination c. antitermination d. induction e. repression 5. The following DNA sequence includes the beginning of a sequence coding for a protein. What type of mutation is created if the C marked by an asterisk was changed to an A? 5’ AGGCTATGAATG GACACTGCGAGCCC…3’ * a. missense mutation b. nonsense mutation c. silent mutation d. frameshift mutation 6. You are given two E. coli auxotrophs (strain A: thr - str S ; strain B: leu - str R – each strain is auxotrophic for only one amino acid). A transformation experiment is set up to allow transformation of DNA from strain A to cells of strain B. How would you evaluate the experiment to determine whether DNA from A transformed strain B (assume no transformation of antibiotic sensitivity or resistance)? a. Plate potential B transformants on medium containing no additions.
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This note was uploaded on 04/02/2008 for the course BIO 202 taught by Professor Howe during the Spring '06 term at New Mexico.

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202pracexam3ans - Biology 202 Exam 3 Fall 2006 MATCHING...

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