All tools should be washed in disinfectant after using them on plants infected with TMV - AQA - GCSE Biology - Question 10 - 2018 - Paper 1
Question 10
All tools should be washed in disinfectant after using them on plants infected with TMV.
Suggest why.
Scientists produced a single plant that contained a TMV-resis... show full transcript
Worked Solution & Example Answer:All tools should be washed in disinfectant after using them on plants infected with TMV - AQA - GCSE Biology - Question 10 - 2018 - Paper 1
Step 1
Suggest why.
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Answer
Tools should be washed in disinfectant to kill the TMV virus and prevent its spread to healthy plants.
Step 2
Suggest how scientists can use this plant to produce many plants with the TMV-resistant gene.
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Answer
Scientists can take stem cells from the meristem or use tissue culture to clone the TMV-resistant plant.
Step 3
Describe how you would test for the presence of glucose in fruit.
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Answer
Use Benedict's solution to test for glucose; the solution will turn from blue to orange if glucose is present.
Step 4
Explain why plants with TMV have stunted growth.
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Answer
Plants with TMV have stunted growth due to a lack of chlorophyll, which results in reduced photosynthesis. Consequently, less glucose is produced, leading to insufficient energy for growth and less cellular material for tissue development.
