Biology - Study Guide
8th Edition
ISBN: 9780321501561
Author: Martha R. Taylor
Publisher: PEARSON EDUCATION (COLLEGE)
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Chapter 20, Problem 15TYK
Summary Introduction
Introduction: Gene mapping is usually used to identify or locate the position of a specific gene and also to measure the distance between two genes in a chromosome. It is a graphical representation of the genes or sequences of DNA that are present on the chromosome. Gene mapping plays a vital role in identifying the expression of genes responsible for a disease and its inheritance pattern.
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Students have asked these similar questions
Arrange the following steps in the sequence they would happen in a DNA cloning experiment.
a. sealing DNA fragments into vectors with DNA ligase;
b. utilizing a probe to detect a clone in the library;
c. sequencing the clone's DNA;
d. creating a DNA library of clones;
e. cutting genomic DNA with restriction enzymes.
A.
e,a,d,b,c
B.
a,d,b,c,e
C.
c,b,e,a,d
D.
e,d,a,c,b
Part A:
During cloning, the DNA is cut with a restriction enzyme giving it what?
A.
more introns
B.
sticky ends
C.
a polyA tail
D.
a binding site for a transcription factor
Part B:
If the scientist wanted to have a large number of copies of the gene for use in further study, which technique would the scientist use?
A.
PCR
B.
epigenetics
C.
hybridization
D.
gel electrophoresis
Part C:
If this gene were found to be expressed at different levels in different cells of the same organism, what would be responsible?
A.
transcription factor
B.
rRNA
C.
ribosome
D.
RNA polymerase
Part D:
If a disease were identified as being caused by defects in the cytochrome c gene, then the copy isolated could be used for what?
A.
PCR
B.
gene therapy
C.
stem cell work
D.
DNA fingerprinting
A contig is
a. a set of molecular markers used in gene mapping.
b. a set of overlapping fragments that form a continuous stretch of DNA.
c. a set of fragments generated by a restriction enzyme.
d. a small DNA fragment used in sequencing.
Chapter 20 Solutions
Biology - Study Guide
Ch. 20 - In what ways would third-generation sequencing be...Ch. 20 - The following schematic diagram depicts an...Ch. 20 - Which of the following DNA sequences would most...Ch. 20 - a. When PCR is used to prepare a DNA fragment for...Ch. 20 - a. What are some of the benefits of determining...Ch. 20 - Prob. 6IQCh. 20 - What are some of the practical and ethical...Ch. 20 - Prob. 8IQCh. 20 - Prob. 1SYKCh. 20 - Fill in the table on the previous page on the...
Ch. 20 - Prob. 3SYKCh. 20 - Prob. 1TYKCh. 20 - Prob. 2TYKCh. 20 - Gel electrophoresis is a means of separating...Ch. 20 - Prob. 4TYKCh. 20 - Prob. 5TYKCh. 20 - The following segment of DNA has restriction sites...Ch. 20 - Prob. 7TYKCh. 20 - Prob. 8TYKCh. 20 - Prob. 9TYKCh. 20 - Prob. 10TYKCh. 20 - Prob. 11TYKCh. 20 - Which enzyme is used in the polymerase chain...Ch. 20 - Prob. 13TYKCh. 20 - STRs (short tandem repeats) are a valuable tool...Ch. 20 - Prob. 15TYKCh. 20 - Which of the following has the greatest potential...Ch. 20 - Prob. 17TYKCh. 20 - Petroleum-lysing bacteria are being engineered for...Ch. 20 - Prob. 19TYKCh. 20 - Prob. 20TYK
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- A promoter is ______. a. a specific sequence of DNA nucleotides b. a specific sequence of RNA nucleotides c. a protein that binds to DNA d. an enzyme that synthesizes RNAarrow_forwardWhich of the following is a function of a restriction endonuclease? a. It cleaves a DNA molecule at a specific site. b. It cleaves a DNA molecule at random locations. c. It removes specific codons from an mRNA molecule. d. It removes specific exons from an mRNA molecule.arrow_forwardIn next-generation sequencing, which of these advances allows for massively parallel sequencing? a. Pieces of DNA are fixed to a surface, so we can tell which new nucleotides were added to each piece. b. DNA sequences are read in real-time as nucleotides are added to each piece. c. Each segment of the genome can be pieced back together through shotgun alignment d. Single molecules of DNA can be read without the need for amplification.arrow_forward
- Place the steps of sanger sequencing in order.A. A fluorescent laser excites the fragments and records the wavelength consistent with a single nucleotide. B. ddNTPs bind and stop chain extension.C. DNA fragments are separated by size through a capillary tube. D. DNA polymerase copies the target region of template DNA.E. The final nucleotide of each fragment is labeled with a fluorescent tag.arrow_forwardWhat is a cloning vector? A. The DNA probe used to locate a particular gene in the genome. B. An agent such as plasmid, used to transfer DNA from an in vitro solution into a living cell. C. The laboratory apparatus used to clone genes. D. An enzyme that cuts DNA into restriction fragments.arrow_forwardYou have extracted a long piece of DNA from a human cell and you want to extract the gene of interest for you to clone it. Assuming that you know the sequence of the DNA what methods can youuse to amplify the gene of interest? A. antibody purification B. polymerase chain reaction C. none of the above D. ligationarrow_forward
- Polymerase Chain Reaction, or PCR, can Group of answer choices A. target a specific region of DNA and cut it out of the rest of the genetic material for further analysis. B. copy the number of copies of a selected region of DNA linearly. C. increase the number of copies of a selected region of DNA exponentially. D. copy the entire genome at least a dozen times.arrow_forwardCheese-makers use an enzyme, normally found in cow stomachs, to start the conversion of milk to cheese. The cow gene that codes for this enzyme has been inserted into the genetic material of a microbe, Aspergillus niger. Why are Aspergillus niger cells able to correctly transcribe and translate a cow gene and make this enzyme? A DNA is a double helix. B Cow cells must have contaminated and cross-bred with the A. niger cells. C The genetic code is universalarrow_forwardDNA fragments that are 500 bp, 1000 bp, and 2000 bp in length are separated by gel electrophoresis. Which fragment will migrate farthest in the gel? a. The 2000-bp fragment b. The 1000-bp fragment c. The 500-bp fragment d. All will migrate equal distances.arrow_forward
- From where do we get primers for sequencing DNA? A) they are synthesized by reverse transcriptase B) they are cut out of plasmids using restriction endonucleases C) DNA primase is added to the sequencing reaction and synthesizes the primers D) biotechnology companies synthesize them using organic chemistryarrow_forwardGenetic engineering is the direct modification of an organisms’ DNA using biotechnology. What are the different techniques in genetic engineering? a. Inoculate, Gel electrophoresis, Budding and Cloning b. Grafting, Gene splicing, Budding and Inbreeding c. Cloning, Gene splicing, Gel electrophoresis and Hybridization d. Gene splicing, Grafting, Hybridization and Cloningarrow_forwardDescribe What are the sticky ends of the restriction fragments? Select one: a. The surfaces of sticky ends contain matching base pairs, allowing fragments to splice. b. The surfaces of sticky ends have glue like substance that allow fragments to splice. c. The surfaces of sticky ends contain the exact same nucleotides, allowing fragments to bond. d. The surfaces of sticky ends have velcro like structure, allowing fragments to bond.arrow_forward
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