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Flashcards on Viruses and Prions
Click on the flashcard to see the answer
What is a virus?
A tiny infectious agent that can only replicate inside the cells of an organism.
What is a prion?
An infectious protein that causes neurodegenerative diseases.
How do viruses infect cells?
They attach to the cell surface and inject their genetic material into the cell.
Can prions replicate on their own?
No, they require host cells to replicate.
Do viruses have cell walls?
No, viruses do not have cell walls.
Are prions alive?
No, prions are not considered living organisms.
Are viruses smaller than prions?
Yes, viruses are smaller than prions.
Can prions be destroyed by cooking?
No, prions are extremely resistant to heat and cooking.
Do prions cause human diseases?
Yes, prions can cause neurodegenerative diseases in humans.
How do viruses spread from person to person?
Through close contact or exposure to infected bodily fluids.
What is the Ebola virus?
A deadly virus that causes severe hemorrhagic fever in humans.
What is the role of prions in Mad Cow Disease?
Prions are responsible for causing Mad Cow Disease.
Can viruses be treated with antibiotics?
No, antibiotics are only effective against bacterial infections, not viral infections.
What is the genetic material of a virus?
Either DNA or RNA.
What is the mode of transmission for prion diseases?
Through ingestion of contaminated tissue or exposure to infected fluids.
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Test Your Knowledge
How do viruses replicate?
Through binary fission
By mitosis
By hijacking host cells and using their machinery
Through meiosis
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Which of the following is an example of a prion disease?
Malaria
Creutzfeldt-Jakob disease
Tuberculosis
Diabetes
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What is the primary defense mechanism of the immune system against viruses?
Production of antibodies
Activation of T cells
Phagocytosis
Inflammation
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Which of the following is NOT a symptom of prion diseases?
Memory loss
Muscle stiffness
Personality changes
Rash
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How are prion diseases classified?
Based on the age of the affected individuals
Based on the proteins involved
Based on the affected body parts
Based on the mode of transmission
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Which of the following is a viral disease?
Parkinson's disease
Influenza
Alzheimer's disease
Huntington's disease
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Why are prions difficult to destroy?
They have a protective outer shell
They are resistant to heat and most disinfectants
They multiply rapidly
They hide inside host cells
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Which of the following is a characteristic of viruses?
They perform cellular respiration
They can undergo meiosis
They can't reproduce on their own
They have a nucleus
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What is the protein responsible for the conversion of normal cellular prion protein (PrPC) into the infectious form (PrPSc)?
Hemoglobin
Insulin
Collagen
Prion protein
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How can viruses be prevented?
By taking antibiotics
By getting vaccinated
By avoiding public places
By washing hands with soap
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