Recombinant DNA and Its Applications
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Questions and Answers

What is the definition of recombinant DNA?

  • DNA that is degraded
  • A molecule that combines DNA from two sources (correct)
  • DNA from a single source
  • DNA that is synthesized in a laboratory

    • Which major project is associated with the advancement of recombinant DNA technology?

  • CERN's Large Hadron Collider
  • Human Genome Project (correct)
  • Apollo Mission
  • Manhattan Project

    • What is the primary benefit of placing the human gene for insulin in bacteria?

  • To eliminate diabetes
  • To produce insulin in large quantities for diabetics (correct)
  • To create a new species
  • To study bacterial genetics

    • What universal property of the genetic code makes genetically modified organisms possible?

    <p>The universal nature of the genetic code</p> Signup and view all the answers

    What is the first step in recombinant DNA technology?

    <p>Isolating the gene of interest</p> Signup and view all the answers

    What is the term used for the introduction of recombinant DNA into host cells?

    <p>Transformation</p> Signup and view all the answers

    What is the role of restriction endonucleases in recombinant DNA technology?

    <p>To cut DNA into fragments</p> Signup and view all the answers

    What does 'ligation' refer to in the context of recombinant DNA technology?

    <p>The process of joining DNA fragments</p> Signup and view all the answers

    What is recombinant DNA?

    <p>A molecule that combines DNA from two sources</p> Signup and view all the answers

    Which major project is associated with the advancement of recombinant DNA technology?

    <p>Human Genome Project</p> Signup and view all the answers

    What is the primary benefit of placing the human gene for insulin in bacteria?

    <p>To produce insulin in large quantities for diabetics</p> Signup and view all the answers

    What universal property of the genetic code makes genetically modified organisms possible?

    <p>The universal nature of the genetic code</p> Signup and view all the answers

    What is the first step in recombinant DNA technology?

    <p>Isolating the gene of interest</p> Signup and view all the answers

    What is the term used for the introduction of recombinant DNA into host cells?

    <p>Transformation</p> Signup and view all the answers

    What is the role of restriction endonucleases in recombinant DNA technology?

    <p>To cut DNA into fragments</p> Signup and view all the answers

    In the context of recombinant DNA technology, what does 'ligation' refer to?

    <p>The joining of DNA fragments</p> Signup and view all the answers

    What is the purpose of cloning the DNA of interest into a vector?

    <p>To produce multiple copies of the DNA</p> Signup and view all the answers

    What is the final step in the recombinant DNA technology process as described in the document?

    <p>Recovering and analyzing the cloned DNA</p> Signup and view all the answers

    What is the primary purpose of gene cloning experiments?

    <p>To construct recombinant DNA molecules</p> Signup and view all the answers

    What are the two examples of DNA manipulative techniques mentioned?

    <p>Cutting and joining DNA</p> Signup and view all the answers

    Which enzyme is involved in degrading DNA molecules by breaking phosphodiester bonds?

    <p>Nucleases</p> Signup and view all the answers

    What is the function of ligase enzymes in DNA manipulation?

    <p>To join nucleic acid molecules together</p> Signup and view all the answers

    Which enzyme is commonly used in the polymerase chain reaction (PCR)?

    <p>Taq DNA polymerase</p> Signup and view all the answers

    What type of enzyme is used to remove phosphate groups from the 5′ terminus of a DNA molecule?

    <p>Alkaline phosphatase</p> Signup and view all the answers

    Human insulin produced using recombinant DNA technology is known as:

    <p>Humulin</p> Signup and view all the answers

    Which of the following is an example of a recombinant vaccine?

    <p>Hepatitis B vaccine</p> Signup and view all the answers

    What role does plasmid DNA play in recombinant DNA technology?

    <p>It acts as a vector to transfer genes</p> Signup and view all the answers

    Which enzyme is used to cut DNA at specific sequences in recombinant DNA technology?

    <p>Restriction endonuclease</p> Signup and view all the answers

    The introduction of recombinant DNA into host cells is known as:

    <p>Transformation</p> Signup and view all the answers

    Recombinant human growth hormone (rhGH) is used to treat:

    <p>Growth hormone deficiency</p> Signup and view all the answers

    Which of the following is NOT a step in creating recombinant DNA?

    <p>Inserting the gene into a host genome randomly</p> Signup and view all the answers

    What is the main advantage of recombinant vaccines over traditional vaccines?

    <p>They are safer and cause fewer side effects</p> Signup and view all the answers

    In biopharmaceutical production, what is a commonly used mammalian cell line?

    <p>CHO cells (Chinese Hamster Ovary cells)</p> Signup and view all the answers

    Which of the following describes a biopharmaceutical?

    <p>A product derived from living organisms</p> Signup and view all the answers

    Recombinant DNA technology can be used to produce monoclonal antibodies for:

    <p>All of the above</p> Signup and view all the answers

    Which method is commonly used to introduce recombinant DNA into plant cells?

    <p>Agrobacterium-mediated transformation</p> Signup and view all the answers

    What is the purpose of using a selectable marker gene in recombinant DNA experiments?

    <p>To identify cells that have taken up the recombinant DNA</p> Signup and view all the answers

    Which of the following biopharmaceuticals is produced using recombinant DNA technology?

    <p>Insulin</p> Signup and view all the answers

    Gene therapy, an application of recombinant DNA technology, aims to:

    <p>Replace defective genes with functional ones</p> Signup and view all the answers

    What is a potential advantage of DNA vaccines over traditional vaccines?

    <p>They can induce both humoral and cellular immunity</p> Signup and view all the answers

    Which type of recombinant protein is commonly used as a treatment for multiple sclerosis?

    <p>Interferon-beta</p> Signup and view all the answers

    What is the purpose of using a restriction enzyme in DNA manipulation?

    <p>To cut DNA at specific sequences</p> Signup and view all the answers

    What is the result when DNA is partially digested with a restriction enzyme?

    <p>Only a subset of the possible cleavage sites are cut</p> Signup and view all the answers

    What enzyme would you use to repair single-stranded breaks in DNA?

    <p>DNA ligase</p> Signup and view all the answers

    Study Notes

    Recombinant DNA

    • Recombinant DNA is a molecule that combines DNA from two sources.
    • It is a technology that has been advanced through the Human Genome Project.

    Advantages of Recombinant DNA

    • One of the primary benefits of recombinant DNA is producing insulin in large quantities for diabetics by placing the human gene for insulin in bacteria.
    • The universal property of the genetic code that makes genetically modified organisms possible is the universal nature of the genetic code.

    Steps in Recombinant DNA Technology

    • The first step in recombinant DNA technology is isolating the gene of interest.
    • Restriction endonucleases are used to cut DNA into fragments in recombinant DNA technology.
    • Ligation refers to the joining of DNA fragments.
    • Cloning the DNA of interest into a vector is done to produce multiple copies of the DNA.
    • The final step in the recombinant DNA technology process is recovering and analyzing the cloned DNA.
    • Transformation is the term used for the introduction of recombinant DNA into host cells.

    Recombinant DNA Technology

    • Recombinant DNA technology combines DNA molecules from two sources to create a new molecule.
    • The Human Genome Project is associated with the advancement of recombinant DNA technology.
    • The primary benefit of placing the human gene for insulin in bacteria is to produce insulin in large quantities for diabetics.
    • The universal nature of the genetic code makes genetically modified organisms possible.
    • The first step in recombinant DNA technology is isolating the gene of interest.
    • Transformation is the term used for the introduction of recombinant DNA into host cells.
    • Restriction endonucleases cut DNA into fragments, and ligase enzymes join DNA fragments.

    DNA Manipulation

    • Gene cloning experiments aim to construct recombinant DNA molecules.
    • Cutting and joining DNA are two examples of DNA manipulative techniques.
    • Nucleases are enzymes that degrade DNA molecules by breaking phosphodiester bonds.
    • Ligase enzymes join nucleic acid molecules together.
    • Taq DNA polymerase is commonly used in the polymerase chain reaction (PCR).
    • Alkaline phosphatase is an enzyme that removes phosphate groups from the 5' terminus of a DNA molecule.

    Restriction Endonucleases and Ligases

    • Restriction endonucleases are enzymes that cut DNA at specific sequences.
    • Type II restriction endonucleases are most important in gene cloning.
    • DNase I is an enzyme that targets any internal phosphodiester bond in a DNA molecule.
    • Linkers are short pieces of double-stranded DNA with a known sequence used in DNA manipulation.

    PCR and Gel Electrophoresis

    • PCR is a technique that amplifies specific DNA sequences.
    • Agarose gel is typically used for separating large DNA molecules in electrophoresis.
    • Orthogonal field alternation gel electrophoresis (OFAGE) differs from standard gel electrophoresis in that it uses a pulsed field alternating between two pairs of electrodes.
    • The migration rate of DNA molecules during electrophoresis is inversely proportional to the size of the molecules.

    Protein Purification for Recombinant DNA

    • Cell lysis is the first step in the purification of recombinant proteins.
    • Affinity chromatography is used to specifically bind and isolate the target protein.
    • His-tag, GST-tag, and FLAG-tag are commonly used for purifying recombinant proteins using affinity chromatography.
    • Ion-exchange chromatography separates proteins based on their charge.
    • SDS-PAGE is used to separate proteins based on their size.

    Miscellaneous

    • Bacterial DNA undergoes methylation to protect it from restriction endonucleases.
    • Restriction endonucleases are involved in degrading foreign DNA in bacteria.
    • DNA ligase is used to repair single-stranded breaks in DNA.### Protein Electrophoresis
    • Gel electrophoresis is used to separate molecules based on size and charge
    • SDS-PAGE (Sodium Dodecyl Sulfate Polyacrylamide Gel Electrophoresis) is a type of gel electrophoresis that separates proteins based on their size
    • SDS (Sodium Dodecyl Sulfate) denatures proteins and gives them a uniform charge
    • The stacking gel in SDS-PAGE concentrates proteins into tight bands
    • β-mercaptoethanol helps to break disulfide bonds in proteins
    • Coomassie Blue is a common dye used to stain proteins after electrophoresis
    • APS (Ammonium Persulfate) catalyzes the polymerization of acrylamide in gel preparation

    Gel Filtration Chromatography

    • Gel filtration chromatography separates molecules based on size
    • It is used to separate proteins of different sizes

    Recombinant DNA Technology

    • Recombinant DNA technology is used to produce proteins and hormones for biopharmaceuticals
    • It involves the use of plasmid DNA as a vector to transfer genes
    • Restriction endonucleases are used to cut DNA at specific sequences
    • Transformation is the introduction of recombinant DNA into host cells
    • Recombinant human growth hormone (rhGH) is used to treat growth hormone deficiency
    • Recombinant vaccines are safer and cause fewer side effects than traditional vaccines
    • CHO cells (Chinese Hamster Ovary cells) are commonly used in biopharmaceutical production
    • Biopharmaceuticals are products derived from living organisms
    • Recombinant DNA technology can be used to produce monoclonal antibodies for diagnostic purposes, treating infections, and cancer therapy
    • Agrobacterium-mediated transformation is a method used to introduce recombinant DNA into plant cells
    • Selectable marker genes are used to identify cells that have taken up recombinant DNA
    • Gene therapy aims to replace defective genes with functional ones

    Applications of Recombinant DNA Technology

    • Producing proteins and hormones for biopharmaceuticals
    • Developing recombinant vaccines
    • Producing monoclonal antibodies for diagnostic purposes, treating infections, and cancer therapy
    • Gene therapy to replace defective genes with functional ones
    • Treating growth hormone deficiency with recombinant human growth hormone (rhGH)
    • Producing human insulin using recombinant DNA technology
    • Treating multiple sclerosis with interferon-beta

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    Description

    This quiz covers the basics of recombinant DNA, its technology, and its advantages, including producing insulin for diabetics and genetically modified organisms.

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