Viruses: Structure, Replication, and Impact
Explore the fascinating world of viruses, including their structure, replication cycles, and impact on living organisms. This worksheet covers key concepts suitable for Grade 12 biology students.
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Viruses: Structure, Replication, and Impact
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Read each question carefully and answer to the best of your ability. Diagrams may be provided to assist you.
1. Which of the following is NOT a characteristic of viruses?
They are obligate intracellular parasites.
They contain genetic material (DNA or RNA).
They possess a cellular structure with organelles.
They replicate by taking over host cell machinery.
2. The protein coat surrounding the viral genetic material is called the:
Envelope
Capsid
Nucleoid
Viroid
3. Viruses that infect bacteria are called .
4. The two main types of viral replication cycles are the cycle and the cycle.
5. Briefly describe the basic structure of a virus, including its essential components.
6. Explain the primary difference between the lytic and lysogenic cycles of viral replication.
7. All viruses have a lipid envelope surrounding their capsid.
True
False
8. Viruses can replicate independently outside of a host cell.
True
False
Use the words below to complete the sentences.
9. Viruses can have either or as their genetic material.
10. A is a biological preparation that provides active acquired immunity to a particular infectious disease.