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Chapter 27 and 28 lecture

Chapter 27 and 28 lecture - C hapter 27 and 28 The Hidden...

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Chapter 27 and 28 The Hidden World of Microbes Microbes: To small to be seen clearly without a microscope -Prokaryotes Unicellular eukaryotes range in size 10-100 micrometer -How big is a micrometer? The period at the end of sentence is about 1000 micrometers **Viruses can infect any species on the planet, their one goal is to reproduce** Other “biological” entities: Even smaller than bacteria Not organisms because they don’t have all of the characteristics of living organisms. Viruses: small and come in many different shapes Parts: 1. Genome- genetic information. Can be either single or double stranded DNA or RNA. 2. Capsid- protein coat that surrounds and protects the genome. 3. Envelope- membrane (phospholipid bilayer) which surrounds the capsid. -Hijack cells -highly specific for organisms it infects H1N1: Highly contagious respiratory infection The influenza virus usually enters the body through mucus membranes in the mouth, nose or eyes
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