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Questions and Answers
What is the primary reason viruses are not classified as living organisms?
What is the primary reason viruses are not classified as living organisms?
- They do not have cellular structure. (correct)
- They do not contain genetic material.
- They can reproduce outside a host cell.
- They lack the ability to respire.
Which statement accurately describes the composition of viruses that infect animal cells?
Which statement accurately describes the composition of viruses that infect animal cells?
- They contain either DNA or RNA, but never both. (correct)
- They only contain DNA.
- They contain both DNA and RNA.
- They only contain RNA.
What defines a bacteriophage?
What defines a bacteriophage?
- A virus that can reproduce without a host.
- A virus that specifically infects bacterial cells. (correct)
- A virus with a protein coat made entirely of RNA.
- A virus that infects animal cells.
Which part of a virus is responsible for its protection?
Which part of a virus is responsible for its protection?
Why are most viruses not visible under a light microscope?
Why are most viruses not visible under a light microscope?
Flashcards
Virus
Virus
A non-living infectious particle that can only reproduce inside a living cell.
Virus Size
Virus Size
Viruses are too small to be seen with a light microscope and require an electron microscope to be visualized.
Capsid
Capsid
The outer protein coat of a virus that protects the nucleic acid core.
Obligate Endoparasite
Obligate Endoparasite
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Host Specificity
Host Specificity
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Study Notes
Viruses
- Viruses are unique, displaying characteristics of both living and non-living things
- Cannot be placed in any of the five kingdoms
- Viruses are considered infectious particles
- Virology is the study of viruses
- Viruses cannot breathe, eat, respire, or respond to stimuli
- Viruses only reproduce inside a living cell
- Viruses are obligate endoparasites
- Viruses are host-specific, attacking only certain types of tissue
- Viruses are very small (20-300 nm)
- Viruses are only visible with an electron microscope
- Viruses have a protein coat (capsid) enclosing a nucleic acid core (DNA or RNA)
- Plant viruses have RNA
- Animal viruses have either DNA or RNA, but never both
- Bacteriophages (viruses that infect bacteria) have a DNA core
- Most viruses are symmetrical
- Some viruses are spherical
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Description
Test your knowledge on the unique characteristics of viruses and their role in infection. This quiz covers the essential aspects of virology, including virus structure, reproduction, and classification. Dive in to discover how viruses differ from living organisms and their implications in various hosts.
