Genetics: From Genes to Genomes
6th Edition
ISBN: 9781259700903
Author: Leland Hartwell Dr., Michael L. Goldberg Professor Dr., Janice Fischer, Leroy Hood Dr.
Publisher: McGraw-Hill Education
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Chapter 9, Problem 7P
The following picture shows the ethidium bromide–stained bands revealed by gel electrophoresis of two different DNA samples digested with two different restriction enzymes. One of the DNAs is human genomic DNA, the other is the small genome of a bacteriophage (bacterial virus) that infects E. coli cells. One of the restriction enzymes is EcoRI (5′ G^AATTC 3′); the other is HpaII (5′ C^CGG 3′). For each of the four lanes on the gel (A–D), identify which of the two DNA samples was analyzed and which of the two restriction enzymes was used to digest that DNA. The arrow represents the direction of electrophoresis.
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A 22-kb piece of DNA has the following restriction sites:A batch of this DNA is first fully digested by HpaI alone, then another batch is fully digested by HindIII alone, and finally, a third batch is fully digested by both HpaI and HindIII together. The fragments resulting from each of the three digestions are placed in separate wells of an agarose gel, separated by gel electrophoresis, and stained by ethidium bromide. Draw the bands as they would appear on the gel.
The sequences below indicated the 6bp recognition site for the restriction enzyme EcoRI. The lines indicate the sites where the enzyme will cut each strand. 1). write the sequence and structure of the two DNA pieces after the enzyme cuts (hydrogen bonds holding the strands together between the lines are broken after enzyme cuts) 2). indicate whether EcoRI generates blunt or sticky overhangs
5'- G I A A T T C - 3'
3' - C T T A A l G - 5'
After restriction enzymes cut, they contain unpaired bases. Type II restriction enzymes leave ends that may be 5' overhanging, 3' overhanging, or blunt. In all cases each end is left with a 3' OH and a 5' phosphate. All blunt ends, and any complementary overhanging ends may be re-ligated with T4 DNA ligase, as long as at least one 5'- phosphate is present.
In the tables below G^AATTC means that the end after cutting with enzyme will be:
-----G 3'
-----CTTAA 5'
GTGCA^C means that the end will be:
-----GTGCA 3'
-----C 5'
Which RE’s from table below have a 5’ overhang? Which ones have a 3’ Overhang?
AccI
GT^CGAC
BamHI
G^GATCC
ClaI
AT^CGAT
NsiI
ATGCA^T
PstI
CTGCA^G
BglII
A^GATCT
TaqI
T^CGA
Chapter 9 Solutions
Genetics: From Genes to Genomes
Ch. 9 - Match each of the terms in the left column to the...Ch. 9 - For each of the restriction enzymes listed below:...Ch. 9 - The calculations of the average restriction...Ch. 9 - The DNA molecule whose entire sequence follows is...Ch. 9 - Why do longer DNA molecules move more slowly than...Ch. 9 - Agarose gels with different average pore sizes are...Ch. 9 - The following picture shows the ethidium...Ch. 9 - The linear bacteriophage genomic DNA has at each...Ch. 9 - Consider a partial restriction digestion, in which...Ch. 9 - The text stated that molecular biologists have...
Ch. 9 - a. What is the purpose of molecular cloning? b....Ch. 9 - a. DNA polymerase b. RNA polymerase c. A...Ch. 9 - Is it possible that two different restriction...Ch. 9 - A plasmid vector pBS281 is cleaved by the enzyme...Ch. 9 - A recombinant DNA molecule is constructed using a...Ch. 9 - Suppose you are using a plasmid cloning vector...Ch. 9 - Prob. 17PCh. 9 - The lacZ gene from E. coli encodes the enzyme...Ch. 9 - Your undergraduate research advisor has assigned...Ch. 9 - Which of the enzymes from the following list would...Ch. 9 - You use the primer 5 GCCTCGAATCGGGTACC 3 to...Ch. 9 - a. To make a genomic library useful for sequencing...Ch. 9 - Problem 15 showed part of the sequence of the...Ch. 9 - Eukaryotic genomes are replete with repetitive...
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- Consider the following image of a stained agarose gel representing the separation of a plece of DNA that has been digested by a series of restriction enzymes. Assume no digest fragment is of identical size to another digest fragment. nucleotide pairs (kb) 8 S 45 3.5 AA size Hindill + markers EcoRI Hindill EcoRI - 1st attempt Based on all data presented in the stained agarose gel, which of the following statements is correct? Choose one: OA. The original piece of DNA was circular and was cut by EcoRI twice and Hindill only once. OB. The original piece of DNA was linear and was cut by EcoRI twice and Hindill only once. OC. The original piece of DNA was circular and was cut by EcoRI once and not at all by Hind!!!.arrow_forwardYou are studying a new plasmid, and you digest the plasmid with three restriction enzymes: Eco RI (E), HindlII (H), and Xbal (X). You digest the plasmid DNA with each of the following combinations of enzymes and observe the results on an agarose gel. You are provided a partial plasmid map as shown below to the right. E+H E+X H+x Kb +4.3 +2.8 -+2.5 -2.0 - -1.8 +1.5 -1.0 12 F0.8 +0.5 a. What is the size of this plasmid in base pairs? b. What is the distance in base pairs between E1 and H? c. What is the distance in base pairs between E1 and X? d. What is the distance in base pairs between E2 and H? e. What is the distance in base pairs between E2 and X?arrow_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
- A plasmid DNA and a linear DNA (both of the same size) have one site for a restriction endonuclease. When cut and separated on agarose gel electrophoresis, plasmid shows one DNA band while linear DNA shows two fragments. Explain.arrow_forwardA molecule of double-stranded DNA that is 5 million base pairs long has a base composition that is 62% G + C. How many times, on average, are restriction sites for the following restriction enzymes likely to be present in this DNA molecule? a. HindIII (recognition sequence is AAGCTT)arrow_forwardA linear DNA molecule is subjected to complete restriction digestion by (1) EcoRI alone, (2) HindIII alone, and (3) both enzymes together. The DNA fragments are then separated using gel electrophoresis. Results are shown below: (i) (ii) (iii) EcoRI Hindill Both | | — | | 10 kb 9 kb 8 kb 5 kb 2 kb 1 kb How long is the original DNA molecule? How many EcoRI recognition sites does it have? Does the longest EcoRI fragment contain a HindIII restriction site? Explain your answer.arrow_forward
- The short DNA shown below is to be sequenced. Using your knowledge of how the Sanger method works, in the gel diagram, draw in the bands that will appear when DNA polymerase is added to the reaction along with the four different nucleotide mixtures indicated. Note that some of these mixtures are not what would normally be used in a sequencing reaction. Dideoxynucleatides (ddNTPs) are added in relatively small amounts. The asterisk represents a radioactive label. *5' - 3'-ОН 3' – -- ACGACGCAGGACATTAGAC-5' Nucleotide mixtures: A. DATP, DTTP, dCTP, DGTP, ddTTP (given) B. DATP, ATTP, dCTP, AGTP, ddATE C. dTTP, dGTP. ACTP, ddCTP, ddATP D. DATP, dCTP, dTTP, ddGTP A в с D | || ||arrow_forwarda)Dr. Thisisaneasyexam decides to amplify a gene from a plasmid using PCR. She starts out with 6.6 x 10-14g of a 10 kb template in a 100 µl reaction. Assuming that the molecular weight of the average base pair is 660 Daltons calculate the number of molecules of the template. b)Given that the concentration of each primer (20 base pairs each) is 0.1µM in this same reaction volume (100 µl) calculate the number of molecules of the primer presentarrow_forwardA piece of DNA 5.0 kb long is cloned and then cut out of the vector for analysis. This linear piece of DNA is digested with two restriction enzymes, EcoRI and BamHI, individually and in combination, and the resulting fragment sizes are determined by electrophoresis. The results are as follows: Restriction fragment size 4.5 kb; 0.5 kb 3.0 kb; 2.0 kb 2.5 kb; 2.0 kb; 0.5 kb Enzyme name EcoRI ВатHI EcoRI + BamHI Construct a potential restriction map based on these results.arrow_forward
- A small DNA molecule was cleaved with several different restriction nucleases, and the size of each fragment was determined by gel electrophoresis.The following data were obtained. (a) Is the original molecule linear or circular?(b) Draw a map of restriction sites (showing distances between sites) that isconsistent with the data given.(c) How many additional maps are compatible with the data?(d) What would have to be done to locate the cleavage sites unambiguouslywith respect to each other?arrow_forwardThe following gel was produced in manual DNA sequencing. What would the unknown DNA template be that this gel represents?arrow_forwardThere are three classes of restriction enzymes; Class I, Class II and Class II. Nevertheless, Class II is most popular in recombinant technology. Explain the reason behind this.arrow_forward
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