BIOS 3220 Exam 2 Question &
Answers ( Latest 2025 )
binary fission - CORRECT ANSWERS ✔✔asexual
reproduction in which a cell separates into two identical
daughter cells
cell cycle - CORRECT ANSWERS ✔✔the sequence of
events in a cell's growth-division cycle between the end
of one division and the end of both
origin of replication - CORRECT ANSWERS ✔✔a site on
a chromosome or plasmid where DNA replication is
initiated
replisome - CORRECT ANSWERS ✔✔a large protein
complex that copies the DNA double helix to form two
daughter chromosomes
septation - CORRECT ANSWERS ✔✔the process of
forming a cross wall between two daughter cells during
cell division
cytokinesis - CORRECT ANSWERS ✔✔processes that
apportion the cytoplasm and organelles, synthesize a
septum, and divide a cell into two daughter cells during
cell division
,BIOS 3220 Exam 2 Question &
Answers ( Latest 2025 )
nucleiod occlusion - CORRECT ANSWERS ✔✔a
mechanism used by many bacteria to prevent premature
formation of a septum during binary fission
divisome - CORRECT ANSWERS ✔✔a collection of
proteins that aggregate at the region in a dividing
microbial cell where a septum will form
extreme environments - CORRECT ANSWERS ✔✔an
environment in which physical factors such as
temperature, pH, salinity, and pressure are outside of the
normal range for growth of microorganisms
extremophiles - CORRECT ANSWERS
✔✔microorganisms that grow in extreme environments
halophiles - CORRECT ANSWERS ✔✔a microorganism
that requires high levels of sodium chloride for growth
osmophile - CORRECT ANSWERS ✔✔microorganisms
that grow best in or on media of high solute concentration
,BIOS 3220 Exam 2 Question &
Answers ( Latest 2025 )
compatible solutes - CORRECT ANSWERS ✔✔a low
molecular weight molecule used to protect cells against
changes in solute concentrations in their habitat
water activity - CORRECT ANSWERS ✔✔a quantitative
measure of water availability in the habitat; the activity of
a solution is one-hundredth its relative humidity
osmotolerant - CORRECT ANSWERS ✔✔organisms that
grow over a fairly wide range of water activity or solute
concentration
xerophiles - CORRECT ANSWERS ✔✔microorganisms
that grow best under low water activity conditions, and
may not be able to grow at high aw values
acidophiles - CORRECT ANSWERS ✔✔a microorganism
that has its growth optimum between about pH 0 and 5.5
neutrophiles - CORRECT ANSWERS ✔✔a
microorganism that grows best at a neutral pH range
between pH 5.5 and 8.0
, BIOS 3220 Exam 2 Question &
Answers ( Latest 2025 )
alkaliphiles - CORRECT ANSWERS ✔✔a microorganism
that grows best at pHs from about 8.5 to 11.5
cardinal temperatures - CORRECT ANSWERS ✔✔the
minimal, maximal, and optimum temps for growth
psychrotolerants - CORRECT ANSWERS ✔✔a
microorganism that has a growth optimum between 20
and 30 and a maximum of about 35
psychrophiles - CORRECT ANSWERS ✔✔a
microorganism that has an optimum growth temperature
of 15 or lower and a temperature maximum around 20
mesophiles - CORRECT ANSWERS ✔✔a microorganism
with a growth optimum around 20 to 45, a minimum of 15
to 20, and a maximum about 45 or lower
thermophiles - CORRECT ANSWERS ✔✔a
microorganism that can grow at temps of 55 or higher;
the minimum is normally around 45
Answers ( Latest 2025 )
binary fission - CORRECT ANSWERS ✔✔asexual
reproduction in which a cell separates into two identical
daughter cells
cell cycle - CORRECT ANSWERS ✔✔the sequence of
events in a cell's growth-division cycle between the end
of one division and the end of both
origin of replication - CORRECT ANSWERS ✔✔a site on
a chromosome or plasmid where DNA replication is
initiated
replisome - CORRECT ANSWERS ✔✔a large protein
complex that copies the DNA double helix to form two
daughter chromosomes
septation - CORRECT ANSWERS ✔✔the process of
forming a cross wall between two daughter cells during
cell division
cytokinesis - CORRECT ANSWERS ✔✔processes that
apportion the cytoplasm and organelles, synthesize a
septum, and divide a cell into two daughter cells during
cell division
,BIOS 3220 Exam 2 Question &
Answers ( Latest 2025 )
nucleiod occlusion - CORRECT ANSWERS ✔✔a
mechanism used by many bacteria to prevent premature
formation of a septum during binary fission
divisome - CORRECT ANSWERS ✔✔a collection of
proteins that aggregate at the region in a dividing
microbial cell where a septum will form
extreme environments - CORRECT ANSWERS ✔✔an
environment in which physical factors such as
temperature, pH, salinity, and pressure are outside of the
normal range for growth of microorganisms
extremophiles - CORRECT ANSWERS
✔✔microorganisms that grow in extreme environments
halophiles - CORRECT ANSWERS ✔✔a microorganism
that requires high levels of sodium chloride for growth
osmophile - CORRECT ANSWERS ✔✔microorganisms
that grow best in or on media of high solute concentration
,BIOS 3220 Exam 2 Question &
Answers ( Latest 2025 )
compatible solutes - CORRECT ANSWERS ✔✔a low
molecular weight molecule used to protect cells against
changes in solute concentrations in their habitat
water activity - CORRECT ANSWERS ✔✔a quantitative
measure of water availability in the habitat; the activity of
a solution is one-hundredth its relative humidity
osmotolerant - CORRECT ANSWERS ✔✔organisms that
grow over a fairly wide range of water activity or solute
concentration
xerophiles - CORRECT ANSWERS ✔✔microorganisms
that grow best under low water activity conditions, and
may not be able to grow at high aw values
acidophiles - CORRECT ANSWERS ✔✔a microorganism
that has its growth optimum between about pH 0 and 5.5
neutrophiles - CORRECT ANSWERS ✔✔a
microorganism that grows best at a neutral pH range
between pH 5.5 and 8.0
, BIOS 3220 Exam 2 Question &
Answers ( Latest 2025 )
alkaliphiles - CORRECT ANSWERS ✔✔a microorganism
that grows best at pHs from about 8.5 to 11.5
cardinal temperatures - CORRECT ANSWERS ✔✔the
minimal, maximal, and optimum temps for growth
psychrotolerants - CORRECT ANSWERS ✔✔a
microorganism that has a growth optimum between 20
and 30 and a maximum of about 35
psychrophiles - CORRECT ANSWERS ✔✔a
microorganism that has an optimum growth temperature
of 15 or lower and a temperature maximum around 20
mesophiles - CORRECT ANSWERS ✔✔a microorganism
with a growth optimum around 20 to 45, a minimum of 15
to 20, and a maximum about 45 or lower
thermophiles - CORRECT ANSWERS ✔✔a
microorganism that can grow at temps of 55 or higher;
the minimum is normally around 45
