Concepts of Genetics (12th Edition)
12th Edition
ISBN: 9780134604718
Author: William S. Klug, Michael R. Cummings, Charlotte A. Spencer, Michael A. Palladino, Darrell Killian
Publisher: PEARSON
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Chapter 20, Problem 18PDQ
Summary Introduction
To determine: The cleavage sites in the given piece of DNA provided that the recognition sequence for BamHI is GGATCC and the lambda phage DNA contains approximately 48,500 bp.
Introduction: Deoxyribonucleic acid (DNA) is a genetic molecule composed of two chains. These chains coil around each other to form a double helix structure. These chains are called the backbone of the DNA molecule.
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Give the recognition sequences for each of the restriction enzymes (a) PagI, (b) AluI, (c) PstI, and (d) RcaI. Show the sequence in double-stranded DNA (dsDNA) format, indicate the cleavage position with a ^, and mention which types of ends are generated in each case (blunt or sticky; 5’ or 3’ overhang)?
Recognition sequence for a)PagI cleaves DNA at the recognition sequence 5' ---T ^CATGA--- 3' b) AluI cleaves DNA at the recognition sequence 5' AG^CT 3' c) PstI cleaves DNA at the recog.
How often, on average, would you expect a type II restriction endonuclease to cut a DNA molecule if the recognition sequence for the enzyme had 5 bp? (Assume that the four types of bases are equally likely to be found in the DNA and that the bases in a recognition sequence are independent.) How often would the endonuclease cut the DNA if the recognition sequence had 8 bp?
You are studying a protein that contains the peptide sequence
RDGSWKLVI. The part of the DNA encoding this peptide is included
in the sequence shown below.
5'-CGTGACGGCTCGTGGAAGCTAGTCATC-3'
3'-GCACTGCCGAGCACCTTCGATCAGTAG-5'
This sequence does not contain any BamHI restriction enzyme sites.
The target sequence for the BamHI restriction nuclease is GGATCC.
Your goal is to create a BamHI site on this plasmid by manipulating the
DNA sequence, without changing the coding sequence of the protein. How
would you do this, ie what would the new sequence be?
Chapter 20 Solutions
Concepts of Genetics (12th Edition)
Ch. 20 - A plasmid that is both ampicillin and tetracycline...Ch. 20 - You have just created the worlds first genomic...Ch. 20 - What undesirable or unforeseen consequences might...Ch. 20 - Do we have the ethical right to alter the genomes...Ch. 20 - Should these new technologies be regulated...Ch. 20 - HOW DO WE KNOW? In this chapter we focused on how...Ch. 20 - CONCEPT QUESTION Review the Chapter Concepts list...Ch. 20 - What roles do restriction enzymes, vectors, and...Ch. 20 - The human insulin gene contains a number of...Ch. 20 - Although many cloning applications involve...
Ch. 20 - Using DNA sequencing on a cloned DNA segment, you...Ch. 20 - Restriction sites are palindromic; that is, they...Ch. 20 - List the advantages and disadvantages of using...Ch. 20 - What are the advantages of using a restriction...Ch. 20 - In 1975, the Asilomar Conference on Recombinant...Ch. 20 - In the context of recombinant DNA technology, of...Ch. 20 - If you performed a PCR experiment starting with...Ch. 20 - Prob. 13PDQCh. 20 - Prob. 14PDQCh. 20 - You have recovered a cloned DNA segment from a...Ch. 20 - Prob. 16PDQCh. 20 - Although the capture and trading of great apes has...Ch. 20 - Prob. 18PDQCh. 20 - Prob. 19PDQCh. 20 - Prob. 20PDQCh. 20 - Traditional Sanger sequencing has largely been...Ch. 20 - How is fluorescent in situ hybridization (FISH)...Ch. 20 - What is the difference between a knockout animal...Ch. 20 - Prob. 24PDQCh. 20 - When disrupting a mouse gene by knockout, why is...Ch. 20 - Prob. 26PDQCh. 20 - Prob. 27PDQCh. 20 - As you will learn later in the text (Special...Ch. 20 - The gel presented here shows the pattern of bands...Ch. 20 - A widely used method for calculating the annealing...Ch. 20 - Most of the techniques described in this chapter...Ch. 20 - In humans, congenital heart disease is a common...Ch. 20 - The U.S. Department of Justice has established a...Ch. 20 - Prob. 34ESP
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- The partial sequence of one strand of a double-stranded DNA molecule is 5'-GACGAAGTGCTGCAGAAAGTCCGCGTTATAGGCATGAATTCCTGAGG -3' EcoRI is a restriction enzyme that cleaves after G in the sequence 5'-GAATTC-3'. PstI is a restriction enzyme that cleaves after A in the sequence 5'-CTGCAG-3'. Write the sequence of both strands of the DNA fragment created when this DNA is cleaved with both EcoRI and PstI. The first strand of your duplex DNA fragment should be derived from the given strand sequence. 5'- -3' 3'- -5'arrow_forwardThe restriction endonuclease NciI recognizes and cuts the five-base-pair sequence 5’- CC(G/C)GG-3’ [where (G/C) means either G or C will work at that position]. (1) How often, on average, would this sequence occur in random DNA? Assume the DNA contains 25% each of A, G, T & C. (2) After digestion, Nci1 leaves a one-base 5’ overhang. Write/draw the cut site/digested products.arrow_forwarda) A plasmid DNA in bacteria has a length of 14,000 bp and an Lk of 1300. Calculate the superhelical density o for this plasmid. Show your work for partial credit, round to one digit after the decimal point. b) You use a Type II topoisomerase to change the linking number of this plasmid to 1310. How many turnovers must the topoisomerase perform? Is this resulting plasmid underwound or overwound?arrow_forward
- In yeast cells, telomerase remains active and maintains telomeres of about 300 base pairs. Describe how the telomeres would change over time in a yeast lineage after the following mutations were created. a. The gene encoding the catalytic subunit of the telomerase is inactivated. b. The template portion of the telomerase RNA is changed from 5’-ACACCCACA to 5’-ACAUCUACA.arrow_forwardA virus with a circular double-stranded DNA chromosome contains approximately 10,000 bp. You want to begin characterizing this chromosome by making a map of the cleavage sites of three restriction endonucleases: EcoRI, Hind III, and BamHI. You digest the viral DNA under conditions that allow the endonuclease reactions to go to completion and then subject the digested DNA to electrophoresis on agarose to determine the lengths of the restriction fragments produced in each reaction. Based on the resulting data, draw a map of the viral chromosome indicating the relative positions of the cleavage sites for these restriction endonucleases: Endonuclease EcoRI HindIII BamHI EcoRI + HindIII EcoRI + BamHI HindIII+ BamHI EcoRI + HindIII + BamHI Length of fragments (kb) 6.9, 3.1 5.1, 4.4, 0.5 10.0 3.6, 3.3, 1.5, 1.1, 0.5 5.1, 3.1, 1.8 4.4, 3.3, 1.8, 0.5 3.3, 1.8, 1.5, 1.1, 0.5arrow_forwardThe following diagram shows one-half of a restriction site. (a) Draw the other half. GAC G I C (b) Use heavy arrows (↑1) to identify type II cleavage sites that would yield blunt-ended duplex DNA products. (c) Use light arrows (T1) to identify type II cleavage sites yielding staggered cuts that could be converted directly to recombinant DNA molecules by DNA ligase, with no other enzymes involved. (d) If this were the recognition site for a type I restriction endonu- clease, where would cutting of the duplex occur? (e) If DNA sequences were completely random, how large an inter- val (in kilobase pairs) would you expect between identical copies of this sequence in DNA?arrow_forward
- The human hexokinase enzyme has the same function as the bacterial hexokinase enzyme but is somewhat different in its amino acid sequence. You have obtained a mutant bacterial strain in which the gene for hexokinase is missing. If you introduce into your mutant strain a DNA plasmid engineered to contain the DNA coding sequence of the human hexokinase gene, what must you also include? a)The human hexokinase promoter b)The bacterial hexokinase promoter c)Both the human and bacterial promoters d)You cannot engineer a bacteria to produce a human enzymearrow_forwardWhich of the following set(s) of primers a-d could you use to amplify the following target DNA sequence, which is part of the last protein-coding exon of the CFTR gene? Explain briefly. (Note: The three dots represent the body of the region to be amplified, whose beginning and end are only being shown.) 5' GGCTAAGATCTGAATTTTCCGAG . TTGGGCAATAATGTAGCGCCTT 3' 3' CCGATTCTAGACTTAAAAGGCTC . AACCCGTTATTACATCGCGGAA 5' a. 5' GGAAAATTCAGATCTTAG 3'; 5' TGGGCAATAATGTAGCGC 3' b. 5' GCTAAGATCTGAATTTTC 3'; 3' ACCCGTTATTACATCGCG 5' c. 3' GATTCTAGACTTAAAGGC 5'; 3' АССCGTTATTАСАТСGCG 5 d. 5' GCTAAGATCTGAATTTTC 3'; 5' TGGGCAATAATGTAGCGC 3'arrow_forwardConsider the λ bacteriophage DNA molecule as shown in Figure 21.14. Total digestion with the two restriction endonucleases used does not allow unambiguous placement of restriction sites, as shown in the map. Describe restriction patterns—either from partial digestion or from digestion with both BamHI and EcoRI—that would help to establish the specific map of restriction sites shown in Figure 21.14(b).arrow_forward
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