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15 Cards in this Set
- Front
- Back
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when a cell reproduces by developing a bulge that enlarges and separates from the mother cell, it is reproducting by: |
budding |
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the protein coat of a virus is call the: |
capsid |
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what is a temperate bacteriphages |
do not immediately destroy their hosts; they alterante between a lytic cycle and a lysogenic cycle where the viral genome becomes integrate in the host bacterial DNA (virus that integrates into the host DNA as a prophage) |
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the 5 stages of a lytic infection are attachment, penetration, __________, assembly, and release |
replication and synthesis |
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a ________consists of a short segment of a nucleic acid with a protein coat: |
virus |
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a virus that infects a bacterium is call a |
bacteriophages |
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what is a virulent (lytic) phage? |
a phage that causes disease or death |
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_________converstion ocurs when a bacterium carrying viral genes takes on new, atypical characteristics |
lysogenic |
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The specificity of viruses to different types of cells is due to __________sites on the host cell |
receptor |
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how do retroviruses differ from otehr RNA viruses? |
retroviruses are RNA viruses that have a DNA polymerase called reverse transcripts which transcribes the RNA genome into DNA intermdediate. |
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how do human viruses enter human cells? |
attach to receptor sites found on human cell membranes |
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how do viral proteins damage host cells? |
they attach themselves to the host cell then enter the host cell and synthesize the components it need to reproduce itself; the viral components are assembled and viruses are released from the cell ready to invade other cells |
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viral infections in humans spread via teh circulatory system. viral infections in plants spread from cell to cell by ________________. |
insects, infected seeds, asexual propogation |
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viroids cause a variety of plant diseases and are composed only of |
RNA |
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TEST |
TEST |
