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Summarize the genetic modification process using the example of producing a human protein in bacteria, including: (a) isolating human gene DNA with restriction enzymes to create sticky ends (b) cutting bacterial plasmid DNA with the same enzymes to create complementary sticky ends (c) inserting human DNA into plasmid DNA with DNA ligase to create a recombinant plasmid (d) introducing recombinant plasmids into bacteria (specific details are not necessary) (e) multiplying bacteria with recombinant plasmids (f) expressing the human gene in bacteria to produce the human protein.

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Cambridge IGCSE BiologyBiotechnology and genetic modificationSupplement content

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Summarize the genetic modification process using the example of producing a human protein in bacteria, including: (a) isolating human gene DNA with restriction enzymes to create sticky ends (b) cutting bacterial plasmid DNA with the same enzymes to create complementary sticky ends (c) inserting human DNA into plasmid DNA with DNA ligase to create a recombinant plasmid (d) introducing recombinant plasmids into bacteria (specific details are not necessary) (e) multiplying bacteria with recombinant plasmids (f) expressing the human gene in bacteria to produce the human protein

  • This point belongs to Genetic modification, especially Genetic modification outcomes.
  • You need to be able to summarize the genetic modification process using the example of producing a human protein in bacteria, including: (a) isolating human gene DNA with restriction enzymes to create sticky ends (b) cutting bacterial plasmid DNA with the same enzymes to create complementary sticky ends (c) inserting human DNA into plasmid DNA with DNA ligase to create a recombinant plasmid (d) introducing recombinant plasmids into bacteria (specific details are not necessary) (e) multiplying bacteria with recombinant plasmids (f) expressing the human gene in bacteria to produce the human protein.
  • The key ideas to know are Outline.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

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Paper 4 structured question: Genetic modification

Paper 4Theory (Extended)2 marks

Description

Steps in Genetic Modification

The process involves isolating the human gene using restriction enzymes, cutting bacterial plasmid DNA with the same enzymes, joining the human gene to the plasmid with DNA ligase, introducing the recombinant plasmid into bacteria, and allowing bacteria to multiply and produce the human protein.

  1. a

    State the role of restriction enzymes in genetic modification.

    Aim for approximately 1 distinct marking point.

    [1]
  2. b

    Identify the enzyme that joins human DNA to plasmid DNA.

    Aim for approximately 1 distinct marking point.

    [1]
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