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Describe how the presentation of a virus antigen on a cell leads to the secretion of antibodies against this viral antigen

3 mark question - remember to use key words/phrases the examiner will be looking for to give you the marks. Be concise and specific in your answer - make it as easy as possible for the examiner. Helper T cel...
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Answered by Eleanor M. • Biology tutor
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Compare and contrast competitive and non-competitive enzymes inhibitors

Both competitive and non-competitive inhibitors interfere with the functioning of the enzyme's active site, reducing the number of enzyme-substrate complexes that can form. Competitive inhibitors have a shap...
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Answered by Georgia T. • Biology tutor
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What is the difference between B and T cells?

Both cells are white blood cells and are involved in the immune response . There are two main responses you should be aware of The humoral response and The cell-mediated response B cells are white blood cell...
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Answered by Alexander C. • Biology tutor
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How would a reduced level of chlorphyll in a plant cause a stunted growth? Can anything else affect growth?

Chlorophyll is vital for photosynthesis, which is how the plant makes glucose for energy. If there is less photosynthesis, there will be less glucose made and so less energy released for growth. Glucose is n...
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Answered by Rebecca P. • Biology tutor
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What is the Biuret test? How do I interpret the results?

The Biuret test is a test for protein, which detects for the presence of protein bonds. In the test, Biuret reagent (sodium hydroxide, hydrated copper (II) suphate and sodium tartrate) is added to the liquid...
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Answered by Rebecca P. • Biology tutor
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