10 Questions
What is the size range of viruses?
20-300 nm
How do viruses differ from bacteria in terms of nucleic acid content?
Viruses contain only one type of nucleic acid (either DNA or RNA), never both.
What is the metabolic activity of viruses outside host cells?
Viruses have NO metabolic activity outside the host cells.
What is the defining characteristic of bacteriophages?
They are Bacterial Viruses.
How do viruses replicate inside living cells?
Viruses direct the host cell metabolism to form new copies of viral genes and viral proteins.
What differentiates pox viruses from other viruses in terms of visibility?
They can be seen without an electron microscope
What is the unique characteristic of the genome of viruses?
Contain only one type of nucleic acid (either DNA or RNA), never both
What is the metabolic activity of viruses outside host cells?
They have no metabolic activity outside host cells
What is the size range of most viruses?
(20-300 nm)
What is the replication characteristic of viruses inside living cells?
Can replicate only inside living cells and do not divide by binary fission
Study Notes
Virus Characteristics
- Viruses range in size from 20-400 nanometers (nm) in diameter.
- Viruses differ from bacteria in that they have a single type of nucleic acid (either DNA or RNA) while bacteria have both DNA and RNA.
Metabolic Activity
- Viruses are metabolically inert outside host cells, meaning they do not carry out metabolic activities such as energy production or protein synthesis.
Bacteriophages
- Bacteriophages are a type of virus that specifically infect bacteria.
Replication
- Viruses replicate inside living cells by hijacking the host cell's machinery to produce more viral particles.
Pox Viruses
- Pox viruses are unique in that they can be seen under a light microscope, which is not possible with other viruses due to their smaller size.
Genome Characteristics
- The genome of viruses is unique in that it can be composed of either DNA or RNA, but not both.
Size Range
- Most viruses range in size from 20-400 nm in diameter.
Replication Characteristics
- Viruses replicate inside living cells by producing multiple copies of their genome and assembling new viral particles.
Test your knowledge about viruses and their ability to infect various organisms in nature. This quiz covers the properties of viruses and their differentiation from bacteria.
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