MCB3023 FINAL EXAM|| 95
QUESTIONS WITH ALL CORRECT
ANSWERS
major component of the cell wall of microbes in the Bacteria domain - ANSWER-
peptidoglycan
Truths about early Earth's atmosphere: - ANSWER--H2 gas was present
-reducing atmosphere
-Oxygen present in small amounts
-N2 present in very large amounts
short fiber-like structures that protrude from the bacterial surface and are primarily
used for attachment are called - ANSWER-pili
study of microbiology includes: - ANSWER--fungi
-algae
-bacteria
-viruses
NOT PLANTS
what is required during aerobic respiration - ANSWER-oxygen
approximately when did primitive cells first appear on earth? - ANSWER-3.8 billion
years ago
which region contains the chromosome of the bacterial cell? - ANSWER-Nucleoid
what is the main function of the FtsZ protein in the bacterial cell? - ANSWER-cell
division
beta-lactamase enzymes do what? - ANSWER-inactivate antibiotics like penicillin
during nitrogen fixation, microorganisms convert - ANSWER-ammonia (NH3) to
nitrate (NO3-)
which molecular tool most assisted in providing a more reliable way to verify the
assertions made by Woese et al in their 1990 paper on phylogeny? - ANSWER-PCR
(Polymerase Chain Reaction)
Select the structure and associated function which is incorrect:
S-layer, protection
Flagella, motility
Capsule, protection
Peptidoglycan, protection
TonB, diffusion - ANSWER-TonB, Diffusion
, All known hyperthermophiles possess this enzyme to increase the supercoiling of the
DNA and help stabilize it at high temperatures. - ANSWER-reverse DNA gyrase
in which of these are archaea and bacteria significantly different?
-possessesion of membrane enclosed organelles
-membrane lipid structure
-chromosome size and organization
-cell size
-lack of a membrane-enclosed nucleus - ANSWER-membrane lipid structure (fatty
acid with ester linkages vs Isoprenoids with ether linkages)
which combination of bacterial species was most beneficial for weight gain in
gnotobiotic mice? - ANSWER-bacteroides, methanobrevibacter
what are the main enzymes responsible for replication of DNA in eukaryal cells? -
ANSWER-DNA pol alpha, DNA pol epsilon, and DNA pol delta
term for the transfer of donor DNA to a recipient bacterium via a bacteriophage -
ANSWER-transduction
transfer of donor dna to a recipient via through direct contact - ANSWER-conjugation
transfer of donor dna to a recipient by picking up dna from its environment -
ANSWER-transformation
compared to eukaryal genome, the bacterial genome: - ANSWER-contains usually
one chromosome and most genes occur in a single copy
bacteriophages vary in their ability to infect different strains of bacteria. This is
because some bacteria contain
-------- -------- that cut the phage dn after it enters the cell - ANSWER-restriction
endonucleases
the process of molecular cloning requires: - ANSWER-transposons
what are the two lines of evidence that support the Endosymbiotic Theory for the
origin of chloroplasts? - ANSWER-they divide by binary fission and they contain DNA
chloroplasts most likely originated from - ANSWER-cyanobacteria
plaque forming units counts: - ANSWER-infective viruses only
an instrument designed to use moist heat for sterilization is the - ANSWER-autoclave
which substance inhibits the growth of gram positive bacteria? - ANSWER-bile salts
QUESTIONS WITH ALL CORRECT
ANSWERS
major component of the cell wall of microbes in the Bacteria domain - ANSWER-
peptidoglycan
Truths about early Earth's atmosphere: - ANSWER--H2 gas was present
-reducing atmosphere
-Oxygen present in small amounts
-N2 present in very large amounts
short fiber-like structures that protrude from the bacterial surface and are primarily
used for attachment are called - ANSWER-pili
study of microbiology includes: - ANSWER--fungi
-algae
-bacteria
-viruses
NOT PLANTS
what is required during aerobic respiration - ANSWER-oxygen
approximately when did primitive cells first appear on earth? - ANSWER-3.8 billion
years ago
which region contains the chromosome of the bacterial cell? - ANSWER-Nucleoid
what is the main function of the FtsZ protein in the bacterial cell? - ANSWER-cell
division
beta-lactamase enzymes do what? - ANSWER-inactivate antibiotics like penicillin
during nitrogen fixation, microorganisms convert - ANSWER-ammonia (NH3) to
nitrate (NO3-)
which molecular tool most assisted in providing a more reliable way to verify the
assertions made by Woese et al in their 1990 paper on phylogeny? - ANSWER-PCR
(Polymerase Chain Reaction)
Select the structure and associated function which is incorrect:
S-layer, protection
Flagella, motility
Capsule, protection
Peptidoglycan, protection
TonB, diffusion - ANSWER-TonB, Diffusion
, All known hyperthermophiles possess this enzyme to increase the supercoiling of the
DNA and help stabilize it at high temperatures. - ANSWER-reverse DNA gyrase
in which of these are archaea and bacteria significantly different?
-possessesion of membrane enclosed organelles
-membrane lipid structure
-chromosome size and organization
-cell size
-lack of a membrane-enclosed nucleus - ANSWER-membrane lipid structure (fatty
acid with ester linkages vs Isoprenoids with ether linkages)
which combination of bacterial species was most beneficial for weight gain in
gnotobiotic mice? - ANSWER-bacteroides, methanobrevibacter
what are the main enzymes responsible for replication of DNA in eukaryal cells? -
ANSWER-DNA pol alpha, DNA pol epsilon, and DNA pol delta
term for the transfer of donor DNA to a recipient bacterium via a bacteriophage -
ANSWER-transduction
transfer of donor dna to a recipient via through direct contact - ANSWER-conjugation
transfer of donor dna to a recipient by picking up dna from its environment -
ANSWER-transformation
compared to eukaryal genome, the bacterial genome: - ANSWER-contains usually
one chromosome and most genes occur in a single copy
bacteriophages vary in their ability to infect different strains of bacteria. This is
because some bacteria contain
-------- -------- that cut the phage dn after it enters the cell - ANSWER-restriction
endonucleases
the process of molecular cloning requires: - ANSWER-transposons
what are the two lines of evidence that support the Endosymbiotic Theory for the
origin of chloroplasts? - ANSWER-they divide by binary fission and they contain DNA
chloroplasts most likely originated from - ANSWER-cyanobacteria
plaque forming units counts: - ANSWER-infective viruses only
an instrument designed to use moist heat for sterilization is the - ANSWER-autoclave
which substance inhibits the growth of gram positive bacteria? - ANSWER-bile salts
