MIC 205- Characteristics Of Bacteria (GRAM + / - )

42 cards

mic 205 final study guide- characteristics of bacteria; gram +/-


 
  
Created May 10, 2009
by
rwarsi317

 

 
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1
- one of most important sites for attack by antibiotics-cause symptoms of disease in animals-provides...
 
cell wall
2
2 main wall types:
 
gram +gram -
3
divides bacteria into 2 groups depending on if they retain crystal-violet-iodine stain
 
Gram Stain
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purple/blue-wall contains thicker layer of peptoglycan
 
Gram +
5
pink/red-not as much peptoglycan, and has extra outer membrane
 
Gram -
6
*thick cell walls- extend beyond cell wall + capsule of encapsulated bacteria*may regulate...
 
gram +
7
*on outside of peptidoglycan layer-chemically distinct from usually biological membranes-can...
 
Outer bilayer membrane of Gram - cell wall
8
-on outer membrane-unique to G--LPS covalently attached to thin peptidoglycan layer (cell wall)...
 
LPS (lipopolysaccharide)
9
- gap b/w cell membrane and outer membrane of G-- metabolically active space
 
periplasm
10
*thick peptidoglycan layer*purple - retain the crystal violet-iodine of g-stain
 
gram +
11
*thin peptidoglycan layer  + outermembrane*red/pink - do not retain crystal violet, stained...
 
Gram -
12
-encloses cell cytoplasm-in both G +/-
 
cytoplasmic membrane
13
contains proteins (up to 200 different kinds)
 
phospholipid bilayer in cytoplasmic membrane
14
what carries out most membrane functions?
 
proteins in bilayer
15
-secretion of extracytoplasmic proteins-responses to environmental signals
 
functions of cytoplasmic membrane        
16
phospholipid bilayer is _________ to most substances
 
impermeable
17
-function as pores, channels, or carriers-movement can be passive or active
 
membrane proteins (transport systems)
18
- found in both G +/-- contains genetic information-ribosomes-proteins and enzymes-bacterial...
 
cytoplasm
19
prokaryotes sometimes possess smaller extrachromosomal pieces of DNA called _____ - not critical...
 
plasmids
20
usually one large circular molecules of DNA
 
bacterial chromosome
21
total DNA content
 
genome
22
- no nuclear membrane!-nucleic acids-found in G +/-contains bacterial genome (DNA)
 
  Nucleoid or nuclear region
23
-small extrachromosomal circular DNA molecule-found in both G +/- bacteria-not required for...
 
plasmid
24
-composed of protein and RNA-found in both G+/-- synthesize proteins (important sites of action...
 
Ribosomes
25
acellular infectious agentconsists of nucleic acid (genome) enclosed in protein coat (capside-virally...
 
viruses
26
what is an example of a slow viral infection?
 
HIV
27
only reproduce inside living host cells 
 
viruses -obligate intracellular parasites
28
some replicate in cytoplasm and some in nucleus-viral replication site in host cell is dependent...
 
viral nucleic acid
29
viruses infect every known cell type- 
 
microbial, plant and animal
30
viral nucleic acid structure
 
either DNA or RNA, never both
31
-come as RNA-bring in their own enzymes and copy their RNA to DNA
 
retroviruses
32
protein coat surrounding nucleic acid
 
capsid
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only found in SOME viruses
 
Envelope
34
glycoproteins
 
spikes
35
Virus life cycle:_____ & entry into host cellvirus hijacks _____ & ______ abilities...
 
attachmentbiosyntheticprotein synthesizingreplication of nucleic acidviral proteins
36
DNA replication, transcription , and translation occur in cytoplasm
 
prokaryotes-have cell wall-only viral nucleic acid inters cell
37
DNA replication and transcription in nucleustranslation in cytoplasm
 
eukaryotes
38
five main stages: (bacteria + animal virus)
 
1. attachment2. penetration3. viral synthesis4. assembly & packaging5.virus release from...
39
-replication-production of viral protein & nucleic acid-how this occurs depends on whether...
 
viral synthesis
40
what is an example of assembly and packaging of new virus particles?
 
capsid
41
cell lysis
 
bacteriophage
42
enveloped viruses bud off
 
animal viruses


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