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MCB 2010 (IRSC) Test 3.
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MCB 2010 (IRSC) Test 3.
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MCB 2010 (IRSC) Test 3coccus - ANS-round
coccobacillus - ANS-elongated round or short rod
bacillus - ANS-round
spirillium - ANS-stiff spiral
spirochete - ANS-flexible spiral
pleomorphic - ANS-many shapes
Reproduction of prokaryotes - ANS-all reproduce asexually
binary fission
snapping division
budding
viviparity
binary fission - ANS-cell replicates DNA, cytoplasmic membrane elongates, cross walls
form, cell separates into daughter cells
budding - ANS-cell replicates DNA, cell elongates to form a bud, the expanding
cytoplasmic membrane carries one attached DNA molecule into the bud, young bud,
daughter cell
snapping division - ANS-the outer wall breaks at its weakest point with a snapping
movement that tears it most of the way around. The daughter cells then remain hanging
together, held at an angle by a small remnant of the original outer wall that acts like a
hinge.
viviparity - ANS-live offspring emerge from the body of the dead mother cell
archaea - ANS-lack peptidoglycan
not known to cause disease in humans or animals
Clostridia - ANS-produce toxins that cause diseases in humans
endospores survive harsh conditions
, Mycoplasma - ANS-facultative or obligate anaerobes
lack cell walls
smallest free-living cells
Bacillus - ANS-endospore forming
toxins
Listeria - ANS-contaminates milk and meat products
capable of reproducing under refrigeration
In pregnant woman, what can kill the fetus if it crosses the placenta? - ANS-listeria
lactobacillus - ANS-normal flora can grow in the human moth, stomach, intestinal tract,
and vagina
streptococcus and enterococcus - ANS-cause numerous diseases
staphylococcus - ANS-one of the most common inhabitants of humans
Produces toxins and enzymes that contribute to disease
Some people are carriers meaning they have it but don't get sick
Mycobacterium - ANS-Slow growth, partly due to mycolic acid in its cell walls
Some species are pathogens of animals and humans
Alphaproteobacteria - ANS-are nitrogen fixers or nitrifying bacteria
Rhizobium - ANS-is agricultural
Betaproteobacteria - ANS-- Neisseria (gonorrhea, meningitis), Bordetella (whooping
cough/Pertussis), Burkholderia
Gammaproteobacteria - ANS-Pseudomonads (lung infections, burns, wounds)
Epsilonproteobacteria - ANS-Campylobacter Causes blood poisoning and intestinal
inflammation
Helicobacter Causes ulcers
Chlamydias - ANS-Grow intracellularly
Most common sexually transmitted bacteria in the United States
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