Good Viruses – Viruses
About the Lecture
The lecture Good Viruses – Viruses by Vincent Racaniello, PhD is from the course Microbiology: Introduction.
Included Quiz Questions
Dichanthelium lanuginosum is a species of grass that can grow in the hot (55°C) soil of geothermal areas in Yellowstone National Park in the United States. Which of the following statements best describes how this special heat tolerance is conferred to the grass?
- The grass is colonized by a fungus, which is in turn colonized by a particular virus.
- A plant virus confers heat tolerance.
- A plant fungus confers heat tolerance.
- The plant is able to tolerate high temperatures despite being infected directly by a virus.
- Indirect infection by a fungus permits the plant to tolerate high temperatures.
Which one of the following best describes a virus?
- An infectious, obligate intracellular parasite comprising genetic material (DNA or RNA) surrounded by a viral protein coat and/or an envelope derived from a host cell membrane
- An infectious, variably extracellular parasite comprising genetic material (DNA or RNA) surrounded by a viral protein coat and/or an envelope derived from a host cell membrane
- An infectious, intracellular free-living organism comprising genetic material (DNA) surrounded by a viral protein coat and/or an envelope derived from a host cell membrane
- An infectious, obligate intracellular parasite comprising genetic material (RNA) surrounded by a protein coat and/or an envelope, both derived from a host cell membrane
- An infectious, obligate intracellular parasite comprising genetic material (DNA or RNA) partially or completely surrounded by a viral protein coat and/or an envelope derived from a host cell membrane
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Author of lecture Good Viruses – Viruses
Vincent Racaniello, PhD
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