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Questions and Answers
Which of the following best describes viruses?
What is the main function of a virus capsid?
Are viruses considered to be alive?
Which of the following is NOT a characteristic of enveloped viruses?
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How are viruses classified?
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Which of the following is NOT a mode of viral acquisition?
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What is the correct order of steps in viral replication?
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Which of the following is NOT a possible outcome of a viral infection?
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What is the major advantage of cell culture in viral diagnosis?
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Which technique is NOT used in laboratory diagnosis of viral infections?
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What is a disadvantage of viral culture as a diagnostic method?
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Study Notes
Characteristics of Viruses
- Viruses are tiny infectious agents that require a host cell to replicate and do not exhibit characteristics of living organisms independently.
- The main function of a virus capsid is to protect its genetic material and assist in the delivery of the viral genome into host cells.
Viruses and Life
- Viruses are generally not classified as living organisms due to their inability to carry out metabolic processes or reproduce without a host.
Enveloped Viruses
- Non-characteristic traits of enveloped viruses include being incapable of surviving in harsh environments, unlike non-enveloped viruses that can endure changes in temperature and pH.
Classification of Viruses
- Viruses are classified based on several factors, including type of nucleic acid (DNA or RNA), shape, size, and the presence or absence of an envelope.
Modes of Viral Acquisition
- A possible mode of viral acquisition that does not exist includes methods like phagocytosis, which is not a primary way viruses enter host cells.
Viral Replication Steps
- The correct order of steps in viral replication typically includes attachment, penetration, uncoating, replication, assembly, and release.
Outcomes of Viral Infection
- A non-possible outcome of a viral infection may involve complete immunity in all cases, as various infections can lead to asymptomatic or chronic conditions.
Viral Diagnosis: Cell Culture
- An advantage of cell culture in viral diagnosis is its ability to allow for isolation and identification of viruses, providing a reliable environment for viral growth.
Laboratory Diagnosis Techniques
- Techniques that are not typically used in the laboratory diagnosis of viral infections may include some forms of microscopy or non-specific immunologic assays not tailored for viral identification.
Disadvantages of Viral Culture
- A significant disadvantage of viral culture as a diagnostic method is the time required for viral growth, which can delay diagnosis and treatment in acute infections.
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Description
Test your knowledge on viral morphology and replication in this introductory quiz on viruses and viral infections. Learn about the basics of viral structure and understand the process of viral replication. Join us for an interactive session led by Dr. Muaaz Ather and Prof Manaf Al Qahtani from RCSI Royal College of Surgeons in Ireland. Don't miss out on this opportunity to expand your understanding of viruses and their impact on health.
