ReadingQuizzesWeek6 - for October 29th 1. Why are viruses...

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for October 29th 1. Why are viruses defined as “obligate intracellular parasites?” a. They can only replicate inside a host cell. b. They have evolved multiple times, independently. c. They live as “cells within cells.” d. They kill their hosts. 2. What is the key difference between enveloped and non-enveloped viruses? a. Enveloped viruses have an RNA genome; non-enveloped viruses have a DNA genome. b. Enveloped viruses have a membrane-like layer around their capsid. c. Non-enveloped viruses have a capsid; enveloped viruses do not. d. Enveloped viruses parasitize animal cells; non-enveloped viruses parasitize plant and bacterial cells. 3. In enveloped viruses, what does the envelope consist of? a. A phospholipid bilayer and membrane proteins from the host cell, along with viral proteins. b. A continuous layer of viral proteins. c. Host cell membrane (phospholipid bilayer plus host cell proteins) d. Capsid proteins, imbedded in a membrane-like layer. 4. Compared to organisms, what is the single most outstanding aspect of viral diversity? a. Variation in morphology (size and shape) b. The nature of the particle’s exterior—enveloped or non-enveloped c. Their life cyles—lytic or lysogenic
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This note was uploaded on 04/10/2008 for the course BIOL 180 taught by Professor Freeman during the Fall '07 term at University of Washington.

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ReadingQuizzesWeek6 - for October 29th 1. Why are viruses...

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