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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 magnesium deficiency leads to yellow leaves due to a lack of chlorophyll, which is essential for photosynthesis. Consequently, the plant absorbs less light and produces less glucose. As a result, the plant lacks the necessary sugars for growth, leading to stunted growth.
Step 3
Describe how the scientist would use the protein to produce the PVY monoclonal antibody.
Answer
The scientist injects the PVY protein into a mouse, which then stimulates the immune response. They combine lymphocytes from the mouse with tumor cells to create hybridoma cells. These hybridoma cells produce a monoclonal antibody specifically for PVY. Finally, the scientist clones the hybridoma cells to generate many identical cells that continue to produce the desired antibody.