Concept explainers
To review:
The palindromic recognition sequence in
Introduction:
The deliberate change (modifications) in the genetic material of an organism by altering the
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Essentials Of Genetics (9th Global Edition)
- Use the sequence provided and make use of figure 1 to determine what restriction enzyme uses the spesific recognition site and figure 2 and 3 to detremine how many times does the sequence occur in the λ DNA sequence? GGATCC: __________________________________________________________ GAATTC: ___________________________________________________________ AAGCTT: ___________________________________________________________arrow_forwardWhen linear DNA is sequenced, the nucleotide base pairs are numbered from the start to finish. a DNA molecule that is 3133 base pairs long is digested with RsaI restriction enzyme recognition sites at base numbers 366, 1534, and 2207. What are the sizes of the DNA fragments that will be produced after the DNA is digested with RsaI?arrow_forwardWhen circular DNA is sequenced, the nucleotide base pairs are numbered starting from a fixed position on the DNA, all the way around, usually in a clockwise manner. a DNA molecule that is 3133 base pairs long is digested with RsaI restriction enzyme recognition sites at base numbers 366, 1534, and 2207. What are the sizes of the DNA fragments that will be produced after the DNA is digested with RsaI?arrow_forward
- When joining two or more DNA fragments, a researcher can adjust the sequence at the junction in a variety of subtle ways, as seen in the following exercises.(a) Draw the structure of each end of a linear DNA fragment produced by an EcoRI restriction digest (include those sequences remaining from the EcoRI recognition sequence).(b) Draw the structure resulting from the reaction of this end sequence with DNA polymerase I and the four deoxynucleoside triphosphates.(c) Draw the sequence produced at the junction that arises if two ends with the structure derived in (b) are ligated (d) Draw the structure produced if the structure derived in (a) is treated with a nuclease that degrades only single-stranded DNA.(e) Draw the sequence of the junction produced if an end with structure (b) is ligated to an end with structure (d).(f) Draw the structure of the end of a linear DNA fragment that was produced by a PvuII restriction digest (include those sequences remaining from the PvuII recognition…arrow_forwardIf restriction endonucleases are produced by bacteria within a host, why don’t these enzymes chew up the genomic DNA of their host? What is the role of DNA methyltransferase in this? Indicate the answerarrow_forwardA 2.0kb bacterial plasmid ‘BS1030’ is digested with the restriction endonuclease Sau3A; the plasmid map is depicted in the diagram below and the Sau3A (S) restriction sites are indicated. Which of the following DNA fragments do you expect to see on an agarose gel when you run Sau3A-digested plasmid ‘BS1030’ DNA? a. 250 bp, 450 bp, 550 bp, 1.1 kb, 1.5 kb and 2.0 kb b. 2.0kb c. 250 bp, 400 bp, 450 bp, 500 bp and 550 bp d. 100 bp, 200 bp, 250 bp, 400 bp, 500 bp and 550 bparrow_forward
- For Pet41 (choose Pet41 a, b, or c as provided in the image) how would you design the primers (forward and reverse) for the following gene of interest and what restriction enzymes would be used (as shown in the image)? Be sure to explain and elaborate on why selected and how. Gene of Interest: atgggc gacaaaggga 241 cccgagtgtt caagaaggcc agtccaaatg gaaagctcac cgtctacctg ggaaagcggg 301 actttgtgga ccacatcgac ctcgtggacc ctgtggatgg tgtggtcctg gtggatcctg 361 agtatctcaa agagcggaga gtctatgtga cgctgacctg cgccttccgc tatggccggg 421 aggacctgga tgtcctgggc ctgacctttc gcaaggacct gtttgtggcc aacgtacagt 481 cgttcccacc ggcccccgag gacaagaagc ccctgacgcg gctgcaggaa cgcctcatca 541 agaagctggg cgagcacgct taccctttca cctttgagat ccctccaaac cttccatgtt 601 ctgtgacact gcagccgggg cccgaagaca cggggaaggc ttgcggtgtg gactatgaag 661 tcaaagcctt ctgcgcggag aatttggagg agaagatcca caagcggaat tctgtgcgtc 721 tggtcatccg gaaggttcag tatgccccag agaggcctgg cccccagccc acagccgaga 781 ccaccaggca gttcctcatg tcggacaagc ccttgcacct…arrow_forwardWhat is a restriction digest? What does it mean if you were given a precut DNA?arrow_forwardHow would the results of this activity have been different if the DNA sequence you digested were circular instead of linear? When restriction digests are performed and analyzed in the laboratory, one lane of the agarose gel is loaded with DNA ladders, which are DNA fragments of known sizes. What is the point of including these size standards?arrow_forward
- Consider the ends of the DNA fragments shown below. They have been produced by digestion of a single sequence of DNA using a number of restriction endonucleases. 1. 5'A 3' 3'TTCGA5' 2. 5'G 3' 3'CAGCT5' 3. 5'AATTC3' 3' G5 4. 5'TCGAC3' 3' G5' 5. 5'GGG 3' 3'CCC 5' Which of these ends are capable of annealing and being joined by DNA ligase?arrow_forwardWhich of the following sequences in double-stranded DNA is most likely to be recognized as a cutting site for a restriction enzyme? AAGG TTCC GGCC CCGG ACCA TGGT AAAA TTTTarrow_forwardOn the gel shown below are four DNA samples. Samples A to C are taken from tissues of landslide victims that are being identified, while sample D came from a hair sample brought by a mother looking for the remains of her son. (see img) i. If similar band patterns in a gel are created using the same restriction enzyme, what does that tell you about the DNA sequence of the samples? ii. In sample C, only two fragments were created. How many restriction sites (regions where enzymes cut) are present in sample C?arrow_forward
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