Chapter 21 Bio 104 Study Guide

Chapter 21 Bio 104 Study Guide - 1. Why are viruses...

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1. Why are viruses considered to be nonliving?  Does not consist of a cell,  metabolize, respond to stimuli and can only multiply in host 2. Give a complete description of the structure of viruses.  3. Explain how viruses are classified.  Type of nucleic acid, size and shape,  presence or not of outer envelope. 4. What is meant by saying that viruses are host specific? (Give examples.)  Can only affect certain type of cell, Polio- spinal, HIV- blood cells 5. Describe in detail how viruses replicate, making sure you distinguish  lysogenic from lytic - Lytic= attachment, penetration, biosynthesis, maturation  and release. Lysogenic= integration after penetration then biosynthesis… pathways.  6. What is meant by saying a virus is virulent and by saying certain viruses  are retroviruses?  Retro have RNA that use reverse transcriptase to make it into  DNA 7. What are some common diseases caused by viruses?  HIV, FLU 8. What are emerging viruses, some examples, and what events cause 
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Chapter 21 Bio 104 Study Guide - 1. Why are viruses...

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