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Virus Structure

Virus Structure

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Virus Structure

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  1. Virus Structure

  2. Bellwork

  3. CO: I will compare and describe the structure of a virus to a cell.LO: I will read and watch a video about viruses. I will build a virus.

  4. Science Fact of the Day: Some migratory birds have a "magnetic compass" in their body (a sense called Magnetoreception) to help them navigate using Earth's magnetic field.

  5. Viruses

  6. Anticipation Guide: Discuss the following statements with a partner. Determine if you think they are true or false. • Viruses affect us just like bacteria. • Viruses have DNA. • Viruses can be cured by antibiotics. • Viruses are not alive. • Being a zombie is caused by a virus.

  7. OVERVIEW

  8. Generalized Structure of Viruses Viral components • Nucleic acids • DNA or RNA • Capsid • Protein • Envelope

  9. Generalized Structure of Viruses

  10. Generalized Structure of Viruses

  11. Viruses are highly specific to the cells they infect Examples: 1) plant viruses infect plant cells 2) animal viruses infect only certain related species of animals 3) bacterial viruses (bacteriophage) infect only certain types of bacteria. So, what about zombies?

  12. Think-Pair-Share Are viruses alive? (Justify your answer)

  13. Viruses have both living and nonliving characteristics. Living characteristics of viruses: • They reproduce at a fantastic rate, but only in living host cells. • They can mutate. • They contain DNA or RNA

  14. Nonliving characteristics of viruses: • They are acellular, they contain no cytoplasm or cellular organelles. They are not made of cells. • They carry out no metabolism on their own and must replicate using the host cell's metabolic machinery. • They do not grow or develop

  15. Viruses are NOT alive because they DO NOT have ALL of the characteristics of life.

  16. Viruses range in size from 20 nanometers (nm) – 250 nanometers (nm) 1 nm = 0.00000004 inches If a cell was the size of your classroom, then an average virus would be the size of a softball. proteins animal cells atom bacteria viruses 0 m 10-5 m 10-6 m 10-7 m 10-8 m 10-9 m Go five more feet! 10-10 m A virus’ size helps it to reproduce. We’ll talk about this tomorrow.

  17. Virus Structure Cell Structure

  18. Virus Structure Activity • Create a model of a virus as instructed by your teacher • Label the model correctly • Summarize in 14 words how the structure of your virus is different than a cell.