Virus Reading Guide. How Active Viruses Multiply Virus attaches to the surface of a living cell

Virus Reading Virus Reading GuideGuide

How Active Viruses MultiplyHow Active Viruses Multiply

Virus attaches to the surface of a living cell


Virus injects genetic material into cell


Cell produces viral proteins and genetic material


Viruses assemble


Cell bursts, releasing viruses

How Hidden Viruses MultiplyHow Hidden Viruses Multiply

Virus attaches to the surface of a living cell


Virus’s genetic material becomes part of the cell’s genetic material.


Later, virus’s genetic material becomes active.

How Hidden Viruses MultiplyHow Hidden Viruses MultiplyCell produces viral proteins and genetic

material; viruses are assembled


Cell bursts, releasing viruses

1. Why do biologists consider 1. Why do biologists consider viruses to be nonliving?viruses to be nonliving?

1. Why do biologists consider 1. Why do biologists consider viruses to be nonliving?viruses to be nonliving?

Viruses are not cells and do not have the characteristics of organisms.

2. True/ False. Viruses 2. True/ False. Viruses multiply the same way as multiply the same way as other organisms.other organisms.

2. True/ False. Viruses 2. True/ False. Viruses multiply the same way as multiply the same way as other organisms.other organisms.

False

3. Which is the name of a 3. Which is the name of a living thing that provides living thing that provides energy for a virus or an energy for a virus or an organism?organism?

A.ParasiteB.HostC.BacteriophageD.Particle

3. Which is the name of a 3. Which is the name of a living thing that provides living thing that provides energy for a virus or an energy for a virus or an organism?organism?

B. Host

4. Viruses act like ____ 4. Viruses act like ____ because they destroy the because they destroy the cells in which they multiply.cells in which they multiply.

4. Viruses act like ____ 4. Viruses act like ____ because they destroy the because they destroy the cells in which they multiply.cells in which they multiply.

parasites

5. True/ False. Each virus can 5. True/ False. Each virus can enter only a few types of enter only a few types of cells in a few species.cells in a few species.

5. True/ False. Each virus can 5. True/ False. Each virus can enter only a few types of enter only a few types of cells in a few species.cells in a few species.

True

6. True/ False. All viruses 6. True/ False. All viruses have the same shape.have the same shape.

6. True/ False. All viruses 6. True/ False. All viruses have the same shape.have the same shape.

False

7. A virus that infects 7. A virus that infects bacteria is called a(n) bacteria is called a(n) _______._______.

7. A virus that infects 7. A virus that infects bacteria is called a(n) bacteria is called a(n) _______._______.

bacteriophage

8. True/ False. Viruses are 8. True/ False. Viruses are much smaller than bacteria.much smaller than bacteria.

8. True/ False. Viruses are 8. True/ False. Viruses are much smaller than bacteria.much smaller than bacteria.

True

9. Circle the letter of each 9. Circle the letter of each sentence that is true about sentence that is true about viruses.viruses.a. They are larger than cells.b. They need to be inside a

living cell in order to reproduce.

c. They contain genetic material.

d. They are all round in shape.

9. Circle the letter of each 9. Circle the letter of each sentence that is true about sentence that is true about viruses.viruses.b. They need to be inside

a living cell in order to reproduce.

c. They contain genetic material.

10. Label the two basic parts 10. Label the two basic parts of a virus in this diagram.of a virus in this diagram.


Protein Coat


Protein Coat

Genetic material

11. True/ False. Some 11. True/ False. Some viruses are surrounded by an viruses are surrounded by an outer membrane envelope.outer membrane envelope.

11. True/ False. Some 11. True/ False. Some viruses are surrounded by an viruses are surrounded by an outer membrane envelope.outer membrane envelope.

True

12. What are two functions 12. What are two functions of a virus’s protein coat?of a virus’s protein coat?

12. What are two functions 12. What are two functions of a virus’s protein coat?of a virus’s protein coat?

1.It protects the virus.

2.It allows the virus to attach to certain cells.

13. True/ False. The shape of 13. True/ False. The shape of the proteins allow the virus’s the proteins allow the virus’s coat to attach to only certain coat to attach to only certain cells in the host.cells in the host.

13. True/ False. The shape of 13. True/ False. The shape of the proteins allow the virus’s the proteins allow the virus’s coat to attach to only certain coat to attach to only certain cells in the host.cells in the host.

True

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Virus Reading Guide. How Active Viruses Multiply Virus attaches to the surface of a living cell