MIC 102 QUESTIONS AND ANSWERS
The length of abacterium such as Escherichia coliis approximately - Answers -1 μm =
0.001 mm
Lactobacillusspp. are classified in phylum - Answers -Firmicutes
According to the endosymbiotic theory - Answers -chloroplasts evolved from members
of phylum Cyanobacteria
______ identifies what genes are expressed in a community. - Answers -
Metatranscriptomics
The most abundant phyla in the human gut microbiome are - Answers -Bacteroidetes
and Firmicutes
______ is a cell-surface component made of protein - Answers -Flagellum
The bacterial cell wall - Answers -is a cross linked flexible shell made of murein
peptidoglycan
This cell-surface polymer is required for E. coli motility - Answers -flagellum
Bacteria fromthe ______phylum ______ contain lipopolysaccharide. - Answers -gram-
negative, Bacteroidetes
Escherichia coliO157:H7 has unique antigens for - Answers -flagellin and
lipopolysaccharide
Generation time (g) is - Answers -the time needed for one generation(e.g., 30 min)
In diauxie, a bacterial cultureshifts from one substrate to another that - Answers -
supports a slower doubling time
At generation time (g) = ______, E. colicells are ______ than at g= 40 minutes. -
Answers -20 minutes, larger
A microbe isolated fromahot springs is classified as a - Answers -thermophile
Growth yield is measured at the beginning of - Answers -stationary phase
A mutant penicillin-binding protein that lacks transpeptidatse activity will result in -
Answers -lysis and deathofgrowing cells
and
, failure to crosslink murein glycan chains
The culture medium that supports the largest growth yield for E. coliis - Answers -2mM
lactose
A Bacteroide ssp. mutant that cannot make O antigen will - Answers -be more sensitive
to toxic agents like bile salts
Phylogenetic trees constructed from 16S rRNA sequences are limited because the
rrs(ribosomal RNA small subunit)gene encoding 16S rRNA is subject to horizontal gene
transfer (HGT). This statement is false because - Answers -16S rRNA functions only
with its co-adapted ribosomal proteins (>80) and therefore rrsHGT is selected against.
E. colicapsule synthesis involves - Answers -cytoplasmic synthesis of precursor repeat
units.
An organism that uses CO2 as carbon source is a(n) - Answers -autotroph
NADP transhydrogenase catalyzes - Answers -NADH oxidation coupled to NADP
reduction
In bacteria, formation of the proton motive force - Answers -energizes the cytoplasmic
membrane
Fermentation generates - Answers -reduced carbon productssuch as lactate
Chemoheterotrophic bacteria generate the most energy from - Answers -glucose
oxidation with nitrate as electron acceptor
The Fe3+siderophore enterochelin is important for - Answers -colonization of iron-
limited niches
In the E. coli lacoperon - Answers -glucose transport and phosphorylation is involved in
carbon catabolite repression
Competitive index measures - Answers -relative fitness of different bacterial strains
Phosphorous is assimilated through - Answers -fueling reactions that convert PO42-to
ATP
Fueling reactions that convert PO42-to ATP - Answers -Phosphorous is assimilated
through
The ______ pathway converts acetyl-CoA to ______ - Answers -tricarboxylic acid, CO2
Predationis a form of - Answers -parasitism
The length of abacterium such as Escherichia coliis approximately - Answers -1 μm =
0.001 mm
Lactobacillusspp. are classified in phylum - Answers -Firmicutes
According to the endosymbiotic theory - Answers -chloroplasts evolved from members
of phylum Cyanobacteria
______ identifies what genes are expressed in a community. - Answers -
Metatranscriptomics
The most abundant phyla in the human gut microbiome are - Answers -Bacteroidetes
and Firmicutes
______ is a cell-surface component made of protein - Answers -Flagellum
The bacterial cell wall - Answers -is a cross linked flexible shell made of murein
peptidoglycan
This cell-surface polymer is required for E. coli motility - Answers -flagellum
Bacteria fromthe ______phylum ______ contain lipopolysaccharide. - Answers -gram-
negative, Bacteroidetes
Escherichia coliO157:H7 has unique antigens for - Answers -flagellin and
lipopolysaccharide
Generation time (g) is - Answers -the time needed for one generation(e.g., 30 min)
In diauxie, a bacterial cultureshifts from one substrate to another that - Answers -
supports a slower doubling time
At generation time (g) = ______, E. colicells are ______ than at g= 40 minutes. -
Answers -20 minutes, larger
A microbe isolated fromahot springs is classified as a - Answers -thermophile
Growth yield is measured at the beginning of - Answers -stationary phase
A mutant penicillin-binding protein that lacks transpeptidatse activity will result in -
Answers -lysis and deathofgrowing cells
and
, failure to crosslink murein glycan chains
The culture medium that supports the largest growth yield for E. coliis - Answers -2mM
lactose
A Bacteroide ssp. mutant that cannot make O antigen will - Answers -be more sensitive
to toxic agents like bile salts
Phylogenetic trees constructed from 16S rRNA sequences are limited because the
rrs(ribosomal RNA small subunit)gene encoding 16S rRNA is subject to horizontal gene
transfer (HGT). This statement is false because - Answers -16S rRNA functions only
with its co-adapted ribosomal proteins (>80) and therefore rrsHGT is selected against.
E. colicapsule synthesis involves - Answers -cytoplasmic synthesis of precursor repeat
units.
An organism that uses CO2 as carbon source is a(n) - Answers -autotroph
NADP transhydrogenase catalyzes - Answers -NADH oxidation coupled to NADP
reduction
In bacteria, formation of the proton motive force - Answers -energizes the cytoplasmic
membrane
Fermentation generates - Answers -reduced carbon productssuch as lactate
Chemoheterotrophic bacteria generate the most energy from - Answers -glucose
oxidation with nitrate as electron acceptor
The Fe3+siderophore enterochelin is important for - Answers -colonization of iron-
limited niches
In the E. coli lacoperon - Answers -glucose transport and phosphorylation is involved in
carbon catabolite repression
Competitive index measures - Answers -relative fitness of different bacterial strains
Phosphorous is assimilated through - Answers -fueling reactions that convert PO42-to
ATP
Fueling reactions that convert PO42-to ATP - Answers -Phosphorous is assimilated
through
The ______ pathway converts acetyl-CoA to ______ - Answers -tricarboxylic acid, CO2
Predationis a form of - Answers -parasitism
