A soil bacterium (Agrobacterium tumefaciens) infects roses and fruit trees, stunting their growth - VCE - SSCE Biology - Question 25 - 2007 - Paper 1
Question 25
A soil bacterium (Agrobacterium tumefaciens) infects roses and fruit trees, stunting their growth. A similar bacterium (A. radiobacter) was genetically modified to i... show full transcript
Worked Solution & Example Answer:A soil bacterium (Agrobacterium tumefaciens) infects roses and fruit trees, stunting their growth - VCE - SSCE Biology - Question 25 - 2007 - Paper 1
Step 1
removal of all plasmids.
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Answer
This step is unnecessary. While plasmids play a crucial role in genetic modification, removing all plasmids would eliminate the modified traits.
Step 2
removal of the antibiotic gene.
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Answer
Removing the antibiotic gene would not be necessary for successful treatment, as this gene is intended to aid in the resistance of the modified bacterium.
Step 3
destruction of the antibiotic resistance gene.
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Answer
This action would counteract the purpose of the modification, as the resistance gene is essential for survival against the antibiotic.
Step 4
removal of the plasmid transfer gene.
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Answer
Correct. For the treatment to be successful in the soil, it is crucial to remove the plasmid transfer gene to prevent further antibiotic transfer to other bacteria.
