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Questions and Answers
What is the purpose of the Berkefeld filter described in the text?
What is the purpose of the Berkefeld filter described in the text?
- To retain bacteria and let virus particles pass through (correct)
- To allow both virus particles and bacteria to pass through
- To retain both virus particles and bacteria
- To retain virus particles and let bacteria pass through
What are modern-day filter systems made of?
What are modern-day filter systems made of?
- Glass with a variety of pore sizes
- Metal with biologically active membrane
- Disposable plastic with biologically inert membrane (correct)
- Non-biodegradable plastic with no membrane
Which theory about the evolutionary origin of viruses is considered the predominant hypothesis?
Which theory about the evolutionary origin of viruses is considered the predominant hypothesis?
- Co-evolution theory (correct)
- Viruses are degenerate cells
- Viruses are originated from escaped genes
- Viruses are relics of the 'RNA world'
What is the period populated only by RNA molecules called, as mentioned in the text?
What is the period populated only by RNA molecules called, as mentioned in the text?
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What is the material used in the Berkefeld filter described in the text?
What is the material used in the Berkefeld filter described in the text?
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What is the smallest pore size of the Berkefeld filter designed to retain?
What is the smallest pore size of the Berkefeld filter designed to retain?
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