Viruses: Structure and Function
Explore the basic structure, reproduction, and impact of viruses on living organisms with this Grade 7 science worksheet.
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Viruses: Structure and Function
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Read each question carefully and answer to the best of your ability. Some questions may require you to refer to the provided diagram.
Observe the diagram below showing the structure of a bacteriophage virus.
1. Which of the following is NOT considered a living organism?
Bacteria
Fungi
Virus
Plant
2. What is the main component of a virus's outer protective layer?
Cell wall
Capsid (protein coat)
Cell membrane
Nucleus
3. Viruses can only reproduce inside a living cell.
4. The genetic material of a virus can be either DNA or .
5. Viruses are much smaller than and cannot be seen with a regular light microscope.
6. All viruses are harmful to humans.
True
False
7. Vaccines help prevent viral infections.
True
False
8. Briefly explain why viruses are often described as 'parasites'.
9. Describe one way viruses spread from one organism to another.