1 markWhich 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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1 markWhat 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 markWhich 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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1 markWhich 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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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 markGenes 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?
| Â | 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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1 markWhat 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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1 markThe stages of genetic engineering are shown in the diagram below.
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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