Genetic Modification (Cambridge O Level Biology)

Exam Questions

55 mins12 questions
1
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1 mark

Which of these statements correctly describes genetic engineering?

  • Only breeding from crop plants that are resistant to pests.

  • Altering the DNA in crop plants so that they are resistant to herbicides.

  • Using yeast to produce ethanol.

  • Production of insulin in the pancreas.

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2
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1 mark

What needs to be inserted into a bacterial cell to allow it to produce insulin to treat diabetes?

  • An enzyme.

  • A molecule of insulin.

  • A length of DNA from a human.

  • A length of DNA from a bacterium.

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1
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1 mark

Which of the following statements would be an advantage of producing genetically modified crops?

  • To decrease the yield of the crop.

  • To prevent resistance to pests.

  • To increase the yield of the crop.

  • To prevent resistance to herbicides.

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2
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1 mark

Which of these is not a correct use of genetic modification?

  • Cloning

  • Resistance to pests

  • Increased crop yield

  • To modify crops to provide additional vitamins

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31 mark

Which statement identifies a possible benefit of genetically modified crop plants?

  • Some crop plants can be genetically modified to give resistance to diseases

  • Cross-pollination of genetically modified crop plants with weeds could produce new varieties of weeds

  • The use of genetically modified crops may explain the increase in food allergies in children

  • There is more research needed on the long-term effects of genetically modified crops on the environment

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1
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Genes are isolated from human DNA using ……1…… enzymes.

A bacterial plasmid is cut with the same enzyme creating ……2…… .

The human DNA is inserted into the bacterial plasmid using the enzyme ……3…… creating  a ……4…… plasmid.

Which row correctly completes gaps 1, 2, 3 and 4?

  1 2 3 4
A restriction sticky ends ligase recombinant
B ligase daughter plasmids ligase restriction
C recombinant new DNA lipase daughter
D ligase sticky ends protease diploid

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    2
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    What is the role of ligase enzymes in genetic engineering?

    • To insert plasmids into bacteria.

    • To join human DNA with plasmid DNA.

    • To isolate human genes.

    • To cut open plasmid DNA.

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    3
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    The stages of genetic engineering are shown in the diagram below.

    image-4-1

    Which stages involve the production of sticky ends?

    • 1, 2 and 3

    • 1 and 2 only

    • 1 and 3 only

    • 2 and 3 only

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