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Questions and Answers
Viruses are classified based on which of the following?
Viruses are classified based on which of the following?
- Nutritional requirements
- Method of movement
- Capsid shape (correct)
- Cell type
What is the primary genetic material found within a virus?
What is the primary genetic material found within a virus?
- Proteins
- Either DNA or RNA (correct)
- Carbohydrates
- Lipids
A virus that infects bacteria is called a:
A virus that infects bacteria is called a:
- Viroid
- Bacteriophage (correct)
- Mycoplasma
- Plasmid
The protein coat surrounding the viral genetic material is known as the:
The protein coat surrounding the viral genetic material is known as the:
Viruses can infect:
Viruses can infect:
What term describes viruses that are completely dependent on a host cell for replication?
What term describes viruses that are completely dependent on a host cell for replication?
Individual proteins that make up the viral capsid are called:
Individual proteins that make up the viral capsid are called:
Long projections that extend from the nucleocapsid are called:
Long projections that extend from the nucleocapsid are called:
Which process is NOT used by viruses for replication?
Which process is NOT used by viruses for replication?
The combination of the viral capsid proteins with the viral nucleic acid is called:
The combination of the viral capsid proteins with the viral nucleic acid is called:
Flashcards
Acellular Particles (Viruses)
Acellular Particles (Viruses)
Non-cellular entities containing either DNA or RNA, requiring a host for reproduction.
Bacteriophage (Phage)
Bacteriophage (Phage)
A virus that infects bacteria.
Capsid
Capsid
The protein shell that encloses the viral genome.
Capsomeres
Capsomeres
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Nucleocapsid
Nucleocapsid
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Spikes
Spikes
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Study Notes
- Acellular particles contain either DNA or RNA
- Viruses are obligate intracellular parasites, meaning they cannot reproduce on their own
- Viruses do not replicate through cell division
- Viruses infect both eukaryotes and prokaryotes
- Bacteriophages (phages) specifically infect bacteria
- Classification of viruses is based on morphology, capsid shape, nucleic acid type, and viral infection methods
Morphology
- Size varies from very small (parvovirus) to large (poxvirus)
- Most viruses are too small to be seen with a light microscope
- Viruses consist of genetic material carried in a viral coat, or capsid
- The capsid is made up of proteins called capsomeres
- The nucleocapsid is the viral capsid proteins associated with the viral nucleic acid
- Spikes are long projections extending from the nucleocapsid
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