Microbiology: An Introduction
11th Edition
ISBN: 9780321733603
Author: Gerard J. Tortora, Berdell R. Funke, Christine L. Case
Publisher: Benjamin Cummings
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Chapter 9, Problem 5R
Which enzyme makes the smallest fragment containing the tetracycline resistance gene?
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What is the expansion of acronym MICA?
What happens in the absence of tryptophan in the 2-3 configuration?
A bloactlve hexapeptide was cleaved by trypsln from a larger proteln. The peptlde was
sequenced by treatment with varlOus reagents and enzymes. The results are as follows:
a) Treatment with cyan0gen bromlde gave a tetrapeptlde of compositlon asp, trp, cys
and met.
b) Treatment with chymotrypsln gave a tripeptlde of compositlon asp, trp and cys, a
dipeptlde wlth the same C-term and an amlno acld.
c) Treatment with streptococcal protease gave a dipeptlde and a tetrapeptlde.
The composltion of the peptlde Is lys, trp, asp, cys and met
1. What Is the sequence of the hexapeptlde?
2. What is the pl of thls peptlde?
Chapter 9 Solutions
Microbiology: An Introduction
Ch. 9 - Compare and contrast the following terms: a. cDNA...Ch. 9 - Differentiate the following terms. Which one is...Ch. 9 - Some commonly used restriction enzymes are listed...Ch. 9 - Suppose you want multiple copies of a gene you...Ch. 9 - Which enzyme makes the smallest fragment...Ch. 9 - Describe a recombinant DNA experiment in two or...Ch. 9 - List at least two examples of the use of rDNA in...Ch. 9 - You are attempting to insert a gene for saltwater...Ch. 9 - How does RNAi silence a gene?Ch. 9 - Prob. 10R
Ch. 9 - Restriction enzymes were first discovered with the...Ch. 9 - The DNA probe, 3-GGCTTA, will hybridize with which...Ch. 9 - Which of the following is the fourth basic step to...Ch. 9 - The following enzymes are used to make cDNA. What...Ch. 9 - If you put a gene in a virus, the next step in...Ch. 9 - You have a small gene that you want replicated by...Ch. 9 - Pieces of human DNA stored in yeast cells. a....Ch. 9 - A population of cells carrying a desired plasmid....Ch. 9 - Self-replicating DNA for transmitting a gene from...Ch. 9 - A gene that hybridizes with mRNA. a. antisense b....Ch. 9 - Design an experiment using vaccinia virus to make...Ch. 9 - Why did the use of DNA polymerase from the...Ch. 9 - The following picture shows bacterial colonies...Ch. 9 - Prob. 1CAECh. 9 - Using the restriction enzyme ECORI, the following...
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- What are endoribonucleases ?arrow_forwardA mutant has no activity for the enzyme isocitrate lyase.Does this result prove that the mutation is in the geneencoding isocitrate lyase?arrow_forwardA bloactlve hexapeptide was cleaved by trypsln from a larger proteln. The peptlde was sequenced by treatment with varlous reagents and enzymes. The results are as follows: a) Treatment wlth cyanOgen bromlde gave a tetrapeptlde of compositlon asp, trp, cys and met. b) Treatment with chymotrypsln gave a tripeptlde of compositlon asp, trp and cys, a dipeptlde wlth the same C-term and an amlno acld. c) Treatment with streptococcal protease gave a dipeptlde and a tetrapeptlde. The composltion of the peptlde Is lys, trp, asp, cys and met 1. What Is the sequence of the hexapeptlde? 2. What is the pl of thls peptlde?arrow_forward
- A gene contains the sequence CGCATACGGTAC that results in the amino acid sequence arg-ile-arq- tyr. A mutation in this gene has a G inserted after the second C in the strand. How will this mutation affect the phenotype? A)This will affect the phenotype because although most of the protein will be identical, the first amino acid will be different. B)This will not affect the phenotype because only the second amino acid is different from the original protein. C)This will not affect the phenotype because the protein will be identical to the original protein. D)This will affect the phenotype because all of the amino acids after the first one will be different from the original protein.arrow_forwardWhat factors account for the high phosphoryl-transfer potential of nucleoside triphosphates?arrow_forwardThe BamH1 enzyme comes at a concentration of 100,000 U/ml. You are asked to digest 20 ug of DNA with this enzyme. Determine: a) How many units will you need? b) How will you dispense them?arrow_forward
- In E. coli, four Hfr strains donate the following markers,shown in the order donated:Strain 1: M Z X W CStrain 2: L A N C WStrain 3: A L B R UStrain 4: Z M U R BAll these Hfr strains are derived from the same F+ strain.What is the order of these markers on the circularchromosome of the original F+?arrow_forwardLet’s suppose you make a transposon library of the cellulose-secreting bacterium Komagataeibacter xylinus, with the goal of finding mutants that produce higher than normal amounts of cellulose, which would be useful industrially. However, despite your best efforts you are unable to isolate any transposon mutants that make more cellulose than the wild-type strain.Why might this have failed? List as many reasons as you can think of.arrow_forwardExplain what is TFIID ?arrow_forward
- Which form of flavin adenine dinucleotide is the "reduced" form, FAD or FADH2? Explainarrow_forwardDoes a gene sequence carry a mutation that might cause adisease?arrow_forwardTwo possible point mutations are the substitution of lysine for leucine or the substitution of serine for threonine. Which is likely to be more serious and why?arrow_forward
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