Bacteria and Viruses Difference between Bacteria and Virus
Bacteria and Viruses
Difference between Bacteria and Virus • Amoeba Sisters • https: //www. youtube. com/watch? v=kx. M_9 DL 2 GYw
Bacteria • All bacteria are unicellular, prokaryotic cells • Bacteria are micro-organisms • (microscopic organisms) • Can vary from 1 nm-20 nm in length (c) Mc. Graw Hill Ryerson 2007 Take the Section 1. 2 Quiz See pages 33 - 34
Bacteria are very small • Average range is 1 um – 20 nm in length • mm = millimeter 1/1000 of a meter • um = micrometer 1/1000 of a meter • Nm = nanometer 1/100 000 of a meter • So 1 um is 1/1000 of a millimeter
Bacteria • Some bacteria are harmful and cause diseases such as: tuberculosis and strep throat. (c) Mc. Graw Hill Ryerson 2007 Take the Section 1. 2 Quiz See pages 33 - 34
Bacteria • Some bacteria are helpful: • used to make food such as: cheese and yogurt, • some live in our gut and help us digest food. (c) Mc. Graw Hill Ryerson 2007 Take the Section 1. 2 Quiz See pages 33 - 34
Bacteria • Bacteria are often grouped by their shape.
Viruses are tiny non-living particles capable of reproducing only when inside a host cell. • Viruses do not contain any cell organelles but do contain genetic material (DNA or RNA) • Viruses can reproduce by using a host cell. • Examples: HIV, chicken pox, and influenza (the flu)
Viruses
Virus Structure
Virus Life Cycle 1. The virus attaches to a specific host cell. 2. The virus injects its DNA into host cell. 3. The viruses DNA causes host cell to make new viral DNA and protein. 4. New viruses are created inside host cell 5. Host cell bursts open and the new viruses are release to infect other host cells.
Life Cycle of a Viruses
Life Cycle of a Virus video • https: //www. youtube. com/watch? v=u. Iut 0 o. VWCEg
Create a Venn Diagram • Comparing prokaryotic and eukaryotic cells.
Which one is the prokaryotic cell?
Homework • Read p 32 to 34 • Workbook pages 10 to 12
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