QQuestionBiology
QuestionBiology
Which best describes viruses?
A. Viruses are nonliving infectious agents.
B. Viruses can replicate without a host cell.
C. Viruses can be killed by strong antibiotics.
D. Viruses are similar to bacterial cells.
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Answer
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Step 1:I'll solve this biology problem step by step:
Step 2:: Understand the characteristics of viruses
- Viruses are unique biological entities that exist in a gray area between living and nonliving systems - They have genetic material (DNA or RNA) but cannot reproduce independently - They require a host cell to replicate and survive
Step 3:: Analyze each option carefully
Option A: Viruses are nonliving infectious agents - This is the most accurate description - Viruses: * Cannot reproduce on their own * Lack cellular structures * Need host cells to replicate * Contain genetic material * Can cause infections Option B: Viruses can replicate without a host cell - Incorrect - Viruses CANNOT replicate without a host cell - They must hijack a host cell's machinery to reproduce Option C: Viruses can be killed by strong antibiotics - Incorrect - Antibiotics are effective against bacterial cells - Viruses are not affected by antibiotics - Antiviral medications are used to treat viral infections Option D: Viruses are similar to bacterial cells - Incorrect - Viruses are fundamentally different from bacterial cells - Bacteria are complete, living cellular organisms - Viruses are acellular and cannot survive independently
Final Answer
Viruses are nonliving infectious agents.
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