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Plants can be infected by fungi, viruses and insects - AQA - GCSE Biology - Question 5 - 2018 - Paper 1
Question 5
Plants can be infected by fungi, viruses and insects. Aphids are small insects that carry pathogens. Figure 6 shows an aphid feeding from a plant stem. An aphid fe... show full transcript
Worked Solution & Example Answer:Plants can be infected by fungi, viruses and insects - AQA - GCSE Biology - Question 5 - 2018 - Paper 1
Step 1
Step 2
Explain how a deficiency of magnesium could cause these symptoms.
Answer
A deficiency of magnesium can lead to yellow leaves due to the lack of chlorophyll, which is essential for photosynthesis. When magnesium is insufficient, plants absorb less light and produce less energy, causing stunted growth because they have less sugar and energy available for cellular activities.
Step 3
Describe how the scientist would use the protein to produce the PVY monoclonal antibody.
Answer
The scientist would inject the PVY protein into a mouse to stimulate an immune response. Lymphocytes from the mouse would be combined with myeloma cells to create hybridoma cells. These hybridomas would then produce monoclonal antibodies specific to PVY, and the scientist would clone these cells to create a large quantity of the antibody.