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11 Cards in this Set
- Front
- Back
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What is a capsule and its function? |
a polysaccharide structure that surrounds the cell envelope function to protect the cell from 1. dehydration 2. phagocytic cells 3. dehydratoion 4. hydrophobic toxins |
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What is a plasmid and its function? |
A plasmid is a DS DNA function: 1. replicate individually from chromosomes 2. produce drug resistance 3. additiona metabolic activities 4. make bacteria --> pathogenic |
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What are the ways of plasmid transmission? |
1. Transformation 2. Transduction 3. Conjugation |
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What is transformation? |
Donor bact lyses plasmid in surrounding environment plasmid is taken up by recipient bact |
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What is transduction? |
the transfer of plasmid from donor bact to recipient bact via a virulence factor e.g. bacteriophage |
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What is conjugation? |
the transfer of plasmid from donor bact to recipient bact via a pilus (cell-to-cell bridge) |
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What is flagella and its function? |
flagella is a long thin appendage of a bact. function: - allow motility via propeller-like movements |
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What are the different types of flagella? |
1. monotrichous 2. lophotrichous 3. amphitrichous 4. peritrichous |
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What is a pili and its functions? |
pili is a hollow protein appendages originated from cell membrane function: - plasmid transfer - attach bact to surfaces - deliver protein/toxins |
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what is frimbriae and its functions? |
frimbriae are short hollow protein appendages function: - resistance to phagocytosis - attach bact to surfaces |
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What are endospores and its functions? |
endospore is a resilient, non-reproductive structure functions: allow cell survive in unfavorable conditions. |
