Paper 1 H - SAMPLE SET 1 Q2
2) Tobacco mosaic virus (TMV) is a disease affecting plants.
Figure 1 shows a leaf infected with TMV.
Figure 1 shows a leaf infected with TMV.
2.1) All tools should be washed in disinfectant after using them on plants infected with TMV.
Suggest why. [1 mark]
2.2) Scientists produced a single plant that contained a TMV-resistant gene.
Suggest how scientists can use this plant to produce many plants with the TMV-resistant gene. [1 mark]
2.3) Some plants produce fruits which contain glucose.
Describe how you would test for the presence of glucose in fruit. [2 marks]
2.4) TMV can cause plants to produce less chlorophyll. This causes leaf discoloration. Explain why plants with TMV have stunted growth. [4 marks]
(Total for Question 2 = 8 marks)
Suggest why. [1 mark]
2.2) Scientists produced a single plant that contained a TMV-resistant gene.
Suggest how scientists can use this plant to produce many plants with the TMV-resistant gene. [1 mark]
2.3) Some plants produce fruits which contain glucose.
Describe how you would test for the presence of glucose in fruit. [2 marks]
2.4) TMV can cause plants to produce less chlorophyll. This causes leaf discoloration. Explain why plants with TMV have stunted growth. [4 marks]
(Total for Question 2 = 8 marks)