Virus
-
Upload
zoellner1216 -
Category
Technology
-
view
215 -
download
0
description
Transcript of Virus
![Page 1: Virus](https://reader036.fdocuments.in/reader036/viewer/2022082921/555d14f5d8b42ab2228b4a6e/html5/thumbnails/1.jpg)
VirusChapter 2 Lesson 1
![Page 2: Virus](https://reader036.fdocuments.in/reader036/viewer/2022082921/555d14f5d8b42ab2228b4a6e/html5/thumbnails/2.jpg)
What are the characteristics of Viruses?
Non-living Tiny Genetic material protected by a
protein coat Unable to reproduce on their own
![Page 3: Virus](https://reader036.fdocuments.in/reader036/viewer/2022082921/555d14f5d8b42ab2228b4a6e/html5/thumbnails/3.jpg)
Why are viruses considered nonliving?
Lack characteristics of living things: › are not cells› don’t use their own energy to grow or
respond to surroundings› cannot make food, take in food or produce
wastes› cannot reproduce on their own
![Page 4: Virus](https://reader036.fdocuments.in/reader036/viewer/2022082921/555d14f5d8b42ab2228b4a6e/html5/thumbnails/4.jpg)
Viral shapes
Bacteriophages
Spherical (RNA)
Crystal (stable. Polio)
Cylinder (plant)
![Page 5: Virus](https://reader036.fdocuments.in/reader036/viewer/2022082921/555d14f5d8b42ab2228b4a6e/html5/thumbnails/5.jpg)
Virus Structure Two parts: core of genetic material & a
protein coat with surface proteins
The virus surface proteins, like keys, only fit into certain host cells› Ex. HIV infects the cells of the immune
system
![Page 6: Virus](https://reader036.fdocuments.in/reader036/viewer/2022082921/555d14f5d8b42ab2228b4a6e/html5/thumbnails/6.jpg)
Viruses & the World Can cause disease
› Once recovered from a viral illness the body becomes immune
Useful› Vaccines, built from viruses, are used to
cause immunity in organisms so they cannot be made ill from a virus
› Gene therapy uses the viral mechanism for infection to deliver new genetic material to cells that need it