The diagram below shows the structure of a typical virus, such as SARS-CoV-2 (a type of coronavirus) - Leaving Cert Biology - Question 7 - 2022
Question 7
The diagram below shows the structure of a typical virus, such as SARS-CoV-2 (a type of coronavirus). It is one example of a harmful virus and it causes COVID-19 in ... show full transcript
Worked Solution & Example Answer:The diagram below shows the structure of a typical virus, such as SARS-CoV-2 (a type of coronavirus) - Leaving Cert Biology - Question 7 - 2022
Step 1
Name molecule A.
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Answer
Nucleic acid or RNA or DNA.
Step 2
Antigens are present in viruses. On the diagram above, draw an arrow from 'X' to accurately show the location of an antigen.
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Draw an arrow from 'X' pointing towards the spike protein or any surface protein part of the virus structure.
Step 3
Explain why viruses are described as obligate parasites.
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Viruses are described as obligate parasites because they require a host cell to replicate and reproduce. They cannot carry out metabolic processes on their own and depend on host mechanisms to multiply.
Step 4
Explain in detail the term vaccination.
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Vaccination is the administration of a non-disease-causing dose of a pathogen (or part of a pathogen) to stimulate the immune system. This process encourages the immune system to produce antibodies or memory cells, which can provide protection against future infections by the real pathogen.
Step 5
Name one harmful virus, other than SARS-CoV-2 (coronavirus).
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Any valid harmful virus.
Step 6
Give one example of a beneficial application of a virus.
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Genetic engineering (vector) or treat bacterial infection or vaccine production or any other valid answer.
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