1. Four genes (A,B,C,D) of a bacterium code for four enzymes (A,B,C,D), which act sequentially tocatalyze the production of compound D, as follows.enzyme Aenzyme Benzyme Cenzyme Dprecursor -----> compound A -----> compound B -----> compound C -----> compound DA number of mutant strains of the bacterium are isolated, which grow only on supplemented media, asoutlined below.Medium supplemented withCompound ACompound BCompound CCompound DStrain 1No growthNo growthGrowthGrowthStrain 2No growthGrowthGrowthGrowthStrain 3No growthNo growthNo growthGrowtha.The mutation in strain 1 is in which gene? How do you know? ✓✓b. The mutation in strain 2 is in which gene? How do you know? ✓✓c. The mutation in strain 3 is in which gene? How do you know? ✓✓

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Answered: 1. Four genes (A,B,C,D) of a bacterium…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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5. You isolate ten new mutant yeast strains that are defective in synthesis of leucine, an amino acid. These Leu- mutants (numbered 1-10) were all isolated in a strain of mating type a (MAT a). S. cerevisiae yeast are either mating type a or α. As it turns out, your high school classmate, now at the University of Chicago, has independently isolated ten yeast Leu- mutants (numbered 11-20) in a strain of mating type α (MAT α). You and your ex-classmate decide to combine your resources and determine how many different genes are represented by your 20 mutant strains. You cross each of the MAT a strains to each of the MAT α strains. Your experimental observations are shown in the table below, where an empty square indicates that the diploid did not grow on minimal medium and a filled square indicates that the diploid did grow on minimal medium. Based on this experiment, what is the minimum number of genes required for leucine synthesis?
Categorize the following as being associated with transformation, conjugation, or transduction. Note that some items may be associated with more than one process. Transformation Conjugation Transduction requires a virus can transfer dead bacterium's DNA to a new host cell efficient way to get naked plasmid into E. coli cells in the lab involves a pilus describes type of horizontal gene transfer in bacteria cells need to be competent process exploitod by biotechnology transfer requires at least two living bacteria alters bacterial genome
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All bacteria can synthesize the 21 amino acids. true False
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20. P2 and P4 are bacteriophages of E. coli. They have the following properties: (1) When P2 phage infects a bacterium, the bacterium eventually bursts, yielding about 100 P2 progeny. (2) When P4 infects a bacterium, the bacterium survives because P4 is a defective phage. (3) When P2 phage and P4 phage coinfect the same bacterium, lysis of the bacterium yields 100 P4 progeny and no P2 progeny, because the presence of P4 inhibits the growth of P2. Suppose 3 x 108 P2 and 2 x 108 P4 are added to 108 bacterial cells. How many bacterial cells will produce P2 progeny? A. 1.28 x 107 В. 6.75 х 105 С. 5.00 х 106 D. 2.56 x 107 E. 3.23 x 104
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3. A scientist wishes to find the sequence of a certain protein. Treatment with FDNB releases asparagine. Treatment with carboxypeptidase releases arginine Treatment with chymotrypsin produces: trp asp-gly-tyr glu-leu-arg asn-ser-tyr pro-gly-cys-pro-ser-ser-tyr thr-cys-asn-cys-val-lle-gly-tyr ser-gly-asp-arg-cys-gin-thr-arg-asp-leu-arg-trp cys-leu-asn-gly-gly-val-cys-met-his-ile-glu-ser-leu-asp-ser-tyr Treament with S. aureus V8 protease produces: leu-arg ser-leu-asp leu-arg-trp-trp-glu arg-cys-gin-thr-arg-asp asn-ser-tyr-pro-gly-cys-pro-ser-ser-tyr-asp ser-tyr-thr-cys-asn-cys-val-ile-gly-tyr-ser-gly-asp gly-tyr-cys-leu-asn-gly-gly-val-cys-met-his-ile-glu What is the amino acid sequence of the protein?
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A THF -wwwwwwwwww DHF -wwwwwww DNA mRNA 30 B с 50 30 Ribosomes 50 30 D E 45. If the microbe uses target modification to avoid Streptomycin, then which structure above should it focus on modifying?
3. Consider the pathway for the synthesis of the amino acid arginine in Neurospora: ARG-F. → ARG-E → citrulline ARG-H ornithine Mutant strains of Neurospora are grown in minimal media supplements as follows. Each mutant strain carries only a single mutation. Growth is shown by (+), no growth is shown by (o). → argininosuccinate > arginine Supplements citrulline arginino- succinate mutant nothing Qraitibine arginine strain +. Indicate the correct strain / defective gene pairing. a) strain a / ARG-F b) strain a/ ARG-H strain b / ARG-F d) strain c / ARG-E e) strain c / ARG-F + + +

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