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Questions and Answers
What is the key step for incorporating the desired DNA fragment into the vector?
What is the key step for incorporating the desired DNA fragment into the vector?
What is the purpose of dephosphorylation in DNA cloning?
What is the purpose of dephosphorylation in DNA cloning?
What is the role of the host organism in DNA cloning?
What is the role of the host organism in DNA cloning?
What is the purpose of digestion in DNA cloning?
What is the purpose of digestion in DNA cloning?
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What is the role of transformation in DNA cloning?
What is the role of transformation in DNA cloning?
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What is the effect of introducing recombinant DNA encoding a protein into a host organism?
What is the effect of introducing recombinant DNA encoding a protein into a host organism?
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What is the purpose of using ampicillin and tetracycline in the selection of transformed cells?
What is the purpose of using ampicillin and tetracycline in the selection of transformed cells?
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Which of the following is NOT a requirement for the expression of foreign proteins in a host organism?
Which of the following is NOT a requirement for the expression of foreign proteins in a host organism?
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In a transformation experiment, cells that are transformed with a non-recombinant vector will:
In a transformation experiment, cells that are transformed with a non-recombinant vector will:
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What is the process called where a recombinant molecule is analyzed to find clones with desired DNA inserts and biological properties?
What is the process called where a recombinant molecule is analyzed to find clones with desired DNA inserts and biological properties?
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What is the purpose of replicating the recombinant molecule inside a host cell?
What is the purpose of replicating the recombinant molecule inside a host cell?
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What is the key difference between non-transformed and transformed cells in the context of this experiment?
What is the key difference between non-transformed and transformed cells in the context of this experiment?
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After replication, what is the next step in the process?
After replication, what is the next step in the process?
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What is the purpose of selecting recombinant colonies?
What is the purpose of selecting recombinant colonies?
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Why is it important to express the recombinant DNA?
Why is it important to express the recombinant DNA?
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What is the term for the production of multiple copies of a recombinant molecule?
What is the term for the production of multiple copies of a recombinant molecule?
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What is the purpose of analyzing the recombinant molecule?
What is the purpose of analyzing the recombinant molecule?
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What is the relationship between the process of screening and the process of expression?
What is the relationship between the process of screening and the process of expression?
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Which vector is most suitable for cloning and expressing genes in mammalian cells?
Which vector is most suitable for cloning and expressing genes in mammalian cells?
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What is the main characteristic of a shuttle vector?
What is the main characteristic of a shuttle vector?
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Which of these vectors is a viral vector?
Which of these vectors is a viral vector?
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Which vector is commonly used for large-scale protein production?
Which vector is commonly used for large-scale protein production?
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Which vector is used to produce recombinant proteins in E. coli?
Which vector is used to produce recombinant proteins in E. coli?
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Why is it important to use a vector with an origin of replication?
Why is it important to use a vector with an origin of replication?
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What is the purpose of using restriction enzymes in cloning?
What is the purpose of using restriction enzymes in cloning?
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What is the role of a promoter in a vector?
What is the role of a promoter in a vector?
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What is the main advantage of using a baculovirus as a vector for protein expression?
What is the main advantage of using a baculovirus as a vector for protein expression?
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Which of these factors does NOT influence the choice of a vector for cloning?
Which of these factors does NOT influence the choice of a vector for cloning?
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What is the primary function of DNA sequencing?
What is the primary function of DNA sequencing?
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What is the significance of the introduction of recombinant DNA technology in the development DNA sequencing?
What is the significance of the introduction of recombinant DNA technology in the development DNA sequencing?
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How does recombinant DNA technology impact gene expression?
How does recombinant DNA technology impact gene expression?
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What is the effect of a recombinant DNA fragment containing an active promoter being located next to a previously silent host cell gene?
What is the effect of a recombinant DNA fragment containing an active promoter being located next to a previously silent host cell gene?
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How does insertional inactivation affect gene expression?
How does insertional inactivation affect gene expression?
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When did the development of rapid and efficient methods for DNA sequencing first take place?
When did the development of rapid and efficient methods for DNA sequencing first take place?
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What is the fundamental principle underlying DNA sequencing?
What is the fundamental principle underlying DNA sequencing?
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What is the significance of the linear order of nucleotide bases in DNA?
What is the significance of the linear order of nucleotide bases in DNA?
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When was the first human hormone produced by recombinant DNA technology?
When was the first human hormone produced by recombinant DNA technology?
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Recombinant DNA technology is used to create what type of DNA?
Recombinant DNA technology is used to create what type of DNA?
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What is a key property of plasmids that contributes to their use as vectors in recombinant DNA?
What is a key property of plasmids that contributes to their use as vectors in recombinant DNA?
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What are the two main components involved in constructing recombinant DNA?
What are the two main components involved in constructing recombinant DNA?
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What happens to the gene in the plasmid when a foreign DNA fragment is inserted?
What happens to the gene in the plasmid when a foreign DNA fragment is inserted?
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What does the term "DNA cloning" refer to?
What does the term "DNA cloning" refer to?
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What role do restriction enzymes play in recombinant DNA technology?
What role do restriction enzymes play in recombinant DNA technology?
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What is the primary function of DNA ligase in the context of recombinant DNA technology?
What is the primary function of DNA ligase in the context of recombinant DNA technology?
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What is meant by the term "chimeric DNA"?
What is meant by the term "chimeric DNA"?
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What is one of the main advantages of using recombinant DNA technology to produce insulin?
What is one of the main advantages of using recombinant DNA technology to produce insulin?
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What is the characteristic property of EcoRI restriction enzyme?
What is the characteristic property of EcoRI restriction enzyme?
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What type of ends are produced by HaeIII restriction enzyme?
What type of ends are produced by HaeIII restriction enzyme?
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What is the key aspect of DNA ligase's function?
What is the key aspect of DNA ligase's function?
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What was the first event that led to the creation of recombinant DNA?
What was the first event that led to the creation of recombinant DNA?
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What type of bond does DNA ligase form to join two pieces of DNA?
What type of bond does DNA ligase form to join two pieces of DNA?
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Which of these statements BEST describes the impact of the Asilomar Conference on recombinant DNA technology?
Which of these statements BEST describes the impact of the Asilomar Conference on recombinant DNA technology?
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Flashcards
Cloning Vector
Cloning Vector
A DNA molecule used to carry foreign DNA into a host cell.
DNA Fragment
DNA Fragment
A specific piece of DNA that is to be cloned.
Ligation
Ligation
The process of joining two DNA fragments together using ligase enzyme.
Transformation
Transformation
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Selection of Recombinant DNA
Selection of Recombinant DNA
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Recombinant DNA
Recombinant DNA
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Host cell
Host cell
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Recombinant colony
Recombinant colony
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Screening for clones
Screening for clones
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DNA insert
DNA insert
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Expression of recombinant DNA
Expression of recombinant DNA
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Molecule analysis
Molecule analysis
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Replication
Replication
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Recombinant DNA Expression
Recombinant DNA Expression
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Transformed Colonies
Transformed Colonies
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Selective Media
Selective Media
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Expression Vectors
Expression Vectors
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Recombinant Protein Production
Recombinant Protein Production
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Recombinant DNA Technology
Recombinant DNA Technology
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Cohen & Boyer
Cohen & Boyer
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DNA Cloning
DNA Cloning
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Plasmid
Plasmid
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Restriction Enzyme
Restriction Enzyme
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Blunt Ends
Blunt Ends
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Cohesive Ends
Cohesive Ends
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Gene Cloning
Gene Cloning
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DNA Ligase
DNA Ligase
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Nobel Prize in Chemistry 1980
Nobel Prize in Chemistry 1980
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Asilomar Conference
Asilomar Conference
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First Human Hormone from rDNA
First Human Hormone from rDNA
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Antibiotic Resistance Genes
Antibiotic Resistance Genes
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Chimeric DNA
Chimeric DNA
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Genetic Recombination
Genetic Recombination
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Molecular Cloning Vector
Molecular Cloning Vector
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YEp24
YEp24
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Viral Vector
Viral Vector
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λgt11
λgt11
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SV40
SV40
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Baculovirus
Baculovirus
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Cloning Steps
Cloning Steps
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Foreign DNA
Foreign DNA
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Active Promoter
Active Promoter
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Insertional Inactivation
Insertional Inactivation
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Silent Gene
Silent Gene
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DNA Sequencing
DNA Sequencing
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Nucleotide Bases
Nucleotide Bases
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DNA Sequencing History
DNA Sequencing History
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Study Notes
Recombinant DNA Technology
- Recombinant DNA is artificially created DNA, combining two or more sequences not normally found together
- Recombinant DNA technology joins DNA molecules from different species, creating new genetic combinations for science, medicine, agriculture, and industry
- Recombinant organisms have a different combination of alleles compared to their parents
Recombinant DNA
- A recombinant organism is an organism whose DNA consists of a different combination of alleles compared to either of its parents
- A recombinant virus is a virus formed by combining genetic material
- Recombinant DNA is an artificial form of DNA
Recombinant DNA Technology
- Scientists use restriction enzymes to cut DNA from different species at specific sites, and then fuse the cut strands together
- The first recombinant DNA molecules were produced in 1972
- The first publications on recombinant DNA technology were in 1972 and 1973
Important Events in Recombinant DNA Technology
- 1972: DNA ligase joined two fragments, creating the first recombinant DNA molecules
- 1973: Concerns arose about the potential hazards of recombinant DNA technology
- 1974: A global moratorium on some recombinant experiments was implemented
- 1975: Guidelines for recombinant DNA technology were developed at the Asilomar Conference
- 1978: The first human hormone (insulin) was produced using recombinant DNA technology
- 1980: The first patent for recombinant DNA technology was granted to Stanley N. Cohen and Herbert Boyer
Bacterial DNA
- Most bacteria have one circular chromosome ranging from 1,000 to 8,000 kilobase pairs
- Plasmids are extra-chromosomal genetic elements, also circular DNA molecules
- A bacterium's complete genome includes the chromosome and plasmids
Plasmids
- Plasmids replicate autonomously within a host
- They often carry genes for resistance to antibiotics (e.g., tetracycline, ampicillin, kanamycin)
- These marker genes are used to identify cells containing the plasmids
Recombinant DNA Technology
- Recombinant DNA molecules are formed by combining genetic material from multiple sources using laboratory methods of genetic recombination (like molecular cloning)
- The chemical structure of DNA is the same across all organisms; the difference lies in the nucleotide sequences
Gene Cloning
- A clone is a collection of identical molecules or cells
- Cloning a gene means creating many copies of it, often by replication in bacteria
- Recombinant DNA technology enables gene manipulation
Restriction Enzymes
- Restriction enzymes (endonucleases) cut DNA at specific nucleotide sequences
- They produce blunt or sticky ends (cohesive ends)
- Blunt ends have no overhangs, sticky ends have overhangs
DNA Ligase
- DNA ligase joins two DNA pieces, catalyzing phosphodiester bond formation
- It works with both blunt and sticky ends, joining double-stranded DNA
Cloning Vectors
- Cloning vectors are DNA molecules that replicate inside living cells (often derived from plasmids or viruses)
- They contain genetic signals for replication, elements for inserting foreign DNA, and elements to identify cells with recombinant DNA
Standard Cloning Protocols
- Choosing a host organism and cloning vector
- Preparing vector DNA
- Preparing the DNA to be cloned (DNA insert)
- Creating recombinant DNA
- Introducing recombinant DNA into host organisms
- Selecting organisms with recombinant DNA
- Screening clones for desired DNA inserts and biological properties
Selection of Recombinant Colonies
- Colonies are selected based on antibiotic resistance associated with antibiotic-containing media
Expression of Recombinant DNA
- Recombinant DNA constructs are able to be expressed in living cells, resulting in recombinant proteins
- Recombinant protein production requires specialized expression vectors.
Polymerase Chain Reaction (PCR)
- A technique that amplifies DNA from very little starting material
- PCR is a critical tool in recombinant DNA technology allowing the amplification of DNA from minute or degraded samples
Insertional Inactivation
- Insertional inactivation occurs when recombinant DNA disrupts a gene, rendering it nonfunctional
- This disruption can result from insertion into a gene's coding sequence
DNA Sequencing
- DNA sequencing determines the order of nucleotide bases in a DNA fragment
- The Sanger method (chain termination method) is widely used, and has been largely automated for faster, more efficient analysis.
Applications of Recombinant DNA
- Forensics, medicine, agriculture, industry
Recombinant Chymosin
- An enzyme used in cheese production
- Genetically engineered chymosin is now commonly used to make cheese in industry today
Zebra Fish
- Zebra fish have been genetically modified to detect pollution
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Description
Test your knowledge on the fundamentals of recombinant DNA technology, including its creation, applications, and historical developments. This quiz covers key concepts such as recombinant organisms, DNA manipulation techniques, and significant milestones in the field.