MBIO 3401 FINAL STUDY SET-QUESTIONS AND
ANSWERS | WITH COMPLETE SOLUTION
A microbe is commonly defined as a ___________________ that requires a microscope to
be seen
living organism
what is the total magnification of the specimen, when we view a specimen in a compound
light microscope using a 10X ocular lens and a 100X objective lens
1000X
(T/F) Microbes could not arise without parents
True
Organisms that live symbiotically inside a larger organism are known as________________
endosymbionts
(T/F) All microbes are prokaryotic
False
Microbes have no role in ________________
None
have roles in:
-baking
-wine production
-yogurt making
,The first person to describe bacteria viewed under a microscope was
Antoni van Leeuwenhoek
which microbes undergo sporulation
clostridium
the shortest lag period would most likely be observed in the transfer
from complex medium to fresh complex medium
describe microaerophiles
they require small oxygen concentration to grow
Many bacteria form specialized, surface-attached communities called-
biofilm
human pathogens are
mesophilic
______________ are organisms adapted to grow at very high pressures
Barophiles/piezophiles
____________ are proteins that infect animals
prions
a bacteriophage is-
a virus that infects a bacteria
,All of the following are used to classify viruses according to the ICTV except-
mutation rate
conditions of an autoclave may be reproduced at home in a-
pressure cooker
filtration of samples to remove microbial cells typically use micropore filters with pore
sizes of
0.2 micrometers
a useful biocontrol alternative to antibiotics for treatment of biofilms that can potentially
lead to chronic infections is-
bacteriophages
the entire genetic complement of DNA in a cell of a particular organism is called
a genome
The general secretion complex known as the SecYEG translocon is found in the-
inner membrane
what is depicted in the picture (inhibition zone in bacterial growth)
antibiotic production has inhibited bacterial growth
Which of the following steps is not part of the life cycle of a lytic phage?
the phage DNA integrates into the bacterial chromosome
Which of the following is incorrect about a virus
, it is a cellular particle
the term ______________ describes a polycistronic messenger RNA whose expression is
under control of a promoter
operon
the nucleoids of bacteria and most archaea, as well as the nuclear DNA of eukaryotes, are
kept _______________ supercoiled
negatively
enzymes that modify the supercoiling of a DNA molecule are called
topoisomerases
In the figure below, which models DNA semiconservative replication, the numeral I points
to ________, II points to ___________, and III points to ______________
new daughter strands, origin, replication fork
DNA and RNA polymerases can only synthesize in the ___________ direction
5'-3'
The largest bacteria known so far is
thiomargarita namibiensis
What region of the chromosome in E. Coli is involved in the replication termination
process
ter
ANSWERS | WITH COMPLETE SOLUTION
A microbe is commonly defined as a ___________________ that requires a microscope to
be seen
living organism
what is the total magnification of the specimen, when we view a specimen in a compound
light microscope using a 10X ocular lens and a 100X objective lens
1000X
(T/F) Microbes could not arise without parents
True
Organisms that live symbiotically inside a larger organism are known as________________
endosymbionts
(T/F) All microbes are prokaryotic
False
Microbes have no role in ________________
None
have roles in:
-baking
-wine production
-yogurt making
,The first person to describe bacteria viewed under a microscope was
Antoni van Leeuwenhoek
which microbes undergo sporulation
clostridium
the shortest lag period would most likely be observed in the transfer
from complex medium to fresh complex medium
describe microaerophiles
they require small oxygen concentration to grow
Many bacteria form specialized, surface-attached communities called-
biofilm
human pathogens are
mesophilic
______________ are organisms adapted to grow at very high pressures
Barophiles/piezophiles
____________ are proteins that infect animals
prions
a bacteriophage is-
a virus that infects a bacteria
,All of the following are used to classify viruses according to the ICTV except-
mutation rate
conditions of an autoclave may be reproduced at home in a-
pressure cooker
filtration of samples to remove microbial cells typically use micropore filters with pore
sizes of
0.2 micrometers
a useful biocontrol alternative to antibiotics for treatment of biofilms that can potentially
lead to chronic infections is-
bacteriophages
the entire genetic complement of DNA in a cell of a particular organism is called
a genome
The general secretion complex known as the SecYEG translocon is found in the-
inner membrane
what is depicted in the picture (inhibition zone in bacterial growth)
antibiotic production has inhibited bacterial growth
Which of the following steps is not part of the life cycle of a lytic phage?
the phage DNA integrates into the bacterial chromosome
Which of the following is incorrect about a virus
, it is a cellular particle
the term ______________ describes a polycistronic messenger RNA whose expression is
under control of a promoter
operon
the nucleoids of bacteria and most archaea, as well as the nuclear DNA of eukaryotes, are
kept _______________ supercoiled
negatively
enzymes that modify the supercoiling of a DNA molecule are called
topoisomerases
In the figure below, which models DNA semiconservative replication, the numeral I points
to ________, II points to ___________, and III points to ______________
new daughter strands, origin, replication fork
DNA and RNA polymerases can only synthesize in the ___________ direction
5'-3'
The largest bacteria known so far is
thiomargarita namibiensis
What region of the chromosome in E. Coli is involved in the replication termination
process
ter
