1. A plasmid was digested with two restriction enzymes, individually and in a double digest. The following fragment sizes (bp) were determined by agarose gel electrophoresis. Restriction Enzyme Fragment Size (bp) EcoRI 30, 15, 5 HindIII 50 ECORI + HindIII 20, 15, 10, 5 Make a restriction map of the plasmid based on this data and indicate the distances between the restriction sites.

1. A plasmid was digested with two restriction enzymes, individually and in a double digest. The following fragment sizes (bp) were determined by agarose gel electrophoresis. Restriction Enzyme Fragment Size (bp) EcoRI 30, 15, 5 HindIII 50 ECORI + HindIII 20, 15, 10, 5 Make a restriction map of the plasmid based on this data and indicate the distances between the restriction sites.

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter18: Dna Technologies: Making And Using Genetically Altered Organisms, And Other Applications

Section: Chapter Questions

Problem 3TYK: Why are antibiotic resistance markers such as ampR important components of bacterial plasmid cloning...

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1. Briefly explain why the total size of the pMBBS plasmid in the Restriction Enzymes practical is 3000bp (base pairs) 2. Briefly explain why the cut sites on the pMBBS plasmid in each Restriction Enzymes (EcoRI, BamHI, and XhoI) just 1 each 3. Briefly explain what led to the 5 fragments formed which linked to the 500bp, 1000bp, 1500bp, 2000bp, 2500bp sizes
1. Given the following restriction endonucleases and the sequences of their corresponding restriction sites, which would be LEAST useful for cutting the plasmid and the foreign DNA to be inserted? [The arrows indicate where cuts are made.] (see img) a. EcoRI b. HindIII c. HaeIII d. BamHI 2. EcoRI and HindIII are two different restriction enzymes. If the DNA from two different sources were cut with either EcoRI or HindIII, which of the cut DNA fragments would NOT join together easily so that they could be sealed with ligase? a. E. coli DNA cut with EcoRI and human DNA cut with HindIII b. E. coli DNA cut with HindIII and mouse DNA cut with HindIII c. human DNA cut with EcoRI and chimpanzee DNA cut with EcoRI d. mouse liver DNA cut with HindIII and mouse kidney DNA cut with HindIII
1. Below is an illustration of two plasmids: the incomplete pKAN-R which contains the gene of interest (rfp), and the good plasmid vector pARA which contains the ampR gene for ampicillin resistance, the araC activator gene and the ori region. Based on this, how are you going assemble to create the desired recombinant plasmid containing all the necessary components? (Keywords: Identify correct restriction enzymes to use to create specific sticky end sequences that will only assemble with the final vector in one orientation)
You isolated a 10,500 base pair plasmid (supercoiled, cccDNA) from E. coli. The plasmid contains one unique recognition site for EcoRI, a restriction enzyme. Restriction enzymes recognize a specific sequence and cut both strands of the DNA at that sequence (Chapter 7). Brief DNase I treatment breaks one (or very few) phosphodiesterbonds in each DNA molecule, leaving the double-stranded DNA with one strand broken but the other strand intact, i.e “nicked.” You briefly incubated the cccDNA at 37°C in four separate reactions containing the components listed below. You ran each reaction sample on an agarose gel and visualized the DNA using ethidium bromide and UV light. The reactions included the appropriate buffer and ATP when required. An agarose gel containing four lanes of possible products is given below. Please refer to Figs. 4-26 and 4-27 in Watson for reference. For each reaction, indicate which lane of the gel contains the products that you would expect to see on your…
83. A plasmid is cut with the restriction enzyme BamH1 giving fragments of 3000 and 1000 bp as identifiedby gel electrophoresis and ethidium bromide staining. In a seperate restriction digest the enzyme EcoR1gives fragments of 1000 and 1500 bp that are apparent on the agarose gel. What is the most likely size ofthe plasmid in bp? Explain why it's 4000
1. Write if the statement is true and modify the statement with the correct answer if its false a.White colonies represent those bacteria that do not express the genes for beta-galactosidase because restriction enzymes have cut the gene and ligase have not repaired the break b.Antibiotic resistance genes in bacterial transformation are used as marker genes because of ease of detection of transformants. c. Bacterial transformation simply means the insertion of a recombinant plasmid into a bacterial cell.
A student wanted to load .75 ug dna on agarose gel and has 4x loading buffer for sample preparation. The student has 50ul purified plasmid, finding concentration of plasmid to be 250 ng/uL The student used 10uL plasmid DNA in 50uL reaction for the restriction digest Give the volumes of restriction digest and 4x loading buffer that student would mix together and load on agarose gel.
1. You have the plasmid pUC18/19, which is a circular plasmid that consists of 2686 bp. What would the number of and length of the fragments be if you cut the plasmid with the following restriction enzymes or combination of enzymes? Give a schematic representation of the digestions.a. PscI & GsuIb. ScaI, PdmI & BsaXI c.ScaI, SspI & EheI
The recognition site of some restriction enzymes are shown. Which will produce sticky ends? A. EcoRI G↓AATTC. B. SmaI CCC↓GGG. C. XhoI C↓TCGAG. D. Both EcoRI and XhoI. E. All the enzymes shown will leave sticky ends.
2. Which of these statements is INCORRECT about restriction enzymes Restriction enzymes form phosphodiester bonds when DNA are assembled Palindromic sequences are recognized by restriction enzymes Restriction enzymes recognize blunt ends Restriction enzymes recognize sticky ends Restriction enzymes originated from bacteria
1. Match the features of plasmids below with their meaning : Origin of replication LacZ gene antibiotic resistance gene Multiple cloning site A.required for maintenance of the plasmid in E. coli cells used to select for coli that contain our plasmid B. Required for replication of plasmid DNA inside an E. coli cell C. An engineered region of the plasmid that contains many unique restriction enzyme recognition Sites D. Allows for screening for plasmids with an insert in the multiple cloning site
Lane 5 in the gel above displays the pBashi cleavage products after restriction digest with the restriction enzymes Xhol+ Pstl. Lane 6 in the gel above displays the pBashi cleavage products after restriction digest with the restriction enzymes Xhol+ HindlII+ Pstl. label on the plasmid. i) The location of the Pstl site ii) The sizes of the new fragments made by this Pstl cut