Viruses and Bacteria

428 views

Published on

Just a quick overview comparison between viruses and bacteria.

Published in: Science, Technology
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
428
On SlideShare
0
From Embeds
0
Number of Embeds
2
Actions
Shares
0
Downloads
25
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Viruses and Bacteria

  1. 1. Viruses and Bacteria
  2. 2. Viruses • A tiny, non-living particle that enters and then reproduces inside a living cell • Needs a host, which provides a source of energy • Parasite – Lives on or in a host and can cause harm
  3. 3. Shapes • Round, rod-shaped, bricks, threads, bullets, robot-like shapes
  4. 4. Sizes • Smaller than cells • Cannot be seen with school microscopes • Measured in nanometers – 1 billionth of a meter
  5. 5. Structure • Two basic parts – Protein coat which protects itself – Inner core • Genetic material
  6. 6. Surface Proteins • Can attach to host cells • Lock and key • Specific
  7. 7. Multiply • Inside host cell – Virus’s genetic material takes over many cell functions – Instructs cell to produce the virus proteins and genetic material – Make new virus’s
  8. 8. Bacteria • Anton van Leeuwenhoek (late 1600s) – Scrapings from teeth – Could only see shapes, but not the parts inside the cells
  9. 9. Bacteria • Prokaryotes – Genetic material is not contained in a nucleus (have no nucleus) – Lack some other structures as well
  10. 10. Shapes and Sizes • Spherical, rodlike, spiral • Vary in size, average is about 0.5-1 micrometer – 1 millionth of a meter

×