Podcast
Questions and Answers
Viruses are considered what type of parasites?
Viruses are considered what type of parasites?
- Facultative extracellular parasites
- Facultative intracellular parasites
- Obligate extracellular parasites
- Obligate intracellular parasites (correct)
What type of nucleic acid is found within a virus?
What type of nucleic acid is found within a virus?
- Both DNA and RNA
- Only RNA
- Only DNA
- Either DNA or RNA (correct)
How do viruses replicate?
How do viruses replicate?
- They do not replicate through cell division (correct)
- Cell division
- Mitosis
- Binary fission
What is the name for a virus that infects bacteria?
What is the name for a virus that infects bacteria?
Which of the following is NOT a criterion used to classify viruses?
Which of the following is NOT a criterion used to classify viruses?
What makes up the viral capsid?
What makes up the viral capsid?
What is referred to as nucleocapsid?
What is referred to as nucleocapsid?
What are spikes on a virus?
What are spikes on a virus?
What is another name for the protein subunits that make up the capsid?
What is another name for the protein subunits that make up the capsid?
What type of cells can viruses infect?
What type of cells can viruses infect?
Which of the following describes viruses?
Which of the following describes viruses?
A very small virus would be called?
A very small virus would be called?
A large virus would be called?
A large virus would be called?
What is the primary function of the viral capsid?
What is the primary function of the viral capsid?
How do viruses typically gain entry into a host cell?
How do viruses typically gain entry into a host cell?
Which of the following is true regarding the size of viruses?
Which of the following is true regarding the size of viruses?
What is the genetic material of a virus made of?
What is the genetic material of a virus made of?
What is an important characteristic of viruses?
What is an important characteristic of viruses?
What does the classification of viruses NOT depend on?
What does the classification of viruses NOT depend on?
How do viruses interact with the host cell to replicate?
How do viruses interact with the host cell to replicate?
What is a key structural component present in all viruses?
What is a key structural component present in all viruses?
What is the significance of viral spikes?
What is the significance of viral spikes?
Which type of virus infects bacteria?
Which type of virus infects bacteria?
What is the nucleocapsid primarily composed of?
What is the nucleocapsid primarily composed of?
Identify the characteristic that is exclusive to viruses:
Identify the characteristic that is exclusive to viruses:
What determines the size of a virus?
What determines the size of a virus?
Which structure enables a virus to attach to a host cell?
Which structure enables a virus to attach to a host cell?
How do viruses differ from bacteria in terms of reproduction?
How do viruses differ from bacteria in terms of reproduction?
Which of the following is correct about virus classification?
Which of the following is correct about virus classification?
What is the main function of capsomeres in a viral structure?
What is the main function of capsomeres in a viral structure?
What impact does a virus have on a host cell?
What impact does a virus have on a host cell?
When classifying viruses, what aspects of their physical form are taken into account?
When classifying viruses, what aspects of their physical form are taken into account?
What roles do spikes play in the lifecycle of a virus?
What roles do spikes play in the lifecycle of a virus?
Which of the following describes a typical virus?
Which of the following describes a typical virus?
Morphological factors help us do what?
Morphological factors help us do what?
Why is it important to understand viral morphology?
Why is it important to understand viral morphology?
Viruses cannot do what independently?
Viruses cannot do what independently?
What is the genetic material in viruses encased by?
What is the genetic material in viruses encased by?
Besides capsid shape and morphology, how else are viruses classified?
Besides capsid shape and morphology, how else are viruses classified?
Besides eukaryotes, what other types of cells do viruses infect?
Besides eukaryotes, what other types of cells do viruses infect?
Flashcards
Acellular Particles (Viruses)
Acellular Particles (Viruses)
Non-cellular entities containing DNA or RNA, requiring a host to reproduce.
Bacteriophage (Phage)
Bacteriophage (Phage)
Viruses that specifically infect bacteria.
Viral Classification
Viral Classification
Virus classification criteria including morphology, capsid shape, nucleic acid type, and infection method.
Viral Morphology
Viral Morphology
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Capsid
Capsid
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Nucleocapsid
Nucleocapsid
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Spikes
Spikes
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Study Notes
- Viruses are acellular particles containing either DNA or RNA.
- They are obligate intracellular parasites, incapable of reproducing on their own.
- Viruses do not replicate through cell division.
- Viruses infect both eukaryotes and prokaryotes.
- Bacteriophages (phages) specifically infect bacteria.
- Viruses are classified based on morphology, capsid shape, nucleic acid type, and viral infection characteristics.
Morphology
- Virus size varies, from very small (parvovirus) to large (poxvirus).
- Most viruses are too small to be visualized by light microscopy.
- Viruses consist of genetic material carried in a viral coat (capsid).
- The capsid is composed of proteins called capsomeres.
- The nucleocapsid refers to the association of viral capsid proteins with viral nucleic acid.
- Spikes are long projections extending from the nucleocapsid.
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