Practice IB Biology Topic A2.3 Viruses with authentic exam-style questions for both SL and HL students. This question bank focuses on the exact syllabus content for A2.3 Viruses and mirrors Paper 1A, 1B, 2 style where relevant.
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Which feature distinguishes the influenza virus shown in the image from bacteriophage lambda?
What is the function of the viral RNA?
The following electron microscope image shows the structure of a virus:
The table below compares key characteristics of viruses and living cells:
| Feature | Virus | Living Cell |
|---|---|---|
| DNA or RNA | Yes | Yes |
| Metabolism | No | Yes |
| Ability to Reproduce | Only inside host cell | Yes (independent cell division) |
| Ribosomes | No | Yes |
| Response to Antibiotics | No | Yes (for bacteria) |
Based on the image and data, explain why viruses are not considered to be living organisms.
Describe one method by which viruses reproduce inside a host cell.
Discuss the impact of viruses on global health, providing examples of major viral pandemics and the strategies used to control viral outbreaks.
Outline the impact of viruses on global health.
Describe the key characteristics of a major viral pandemic, including its impact on global health and at least one strategy used for its control.
Discuss the strategies used to control viral outbreaks.