BIOS 242 exam 2 QUESTIONS
AND VERIFIED CORRECT
ANSWERS GRADED A+
[LATEST 2026-2027] 100%
GUARANTEED PASS
psychrophiles - CORRECT ANSWER-Cold-loving Microbes. 0-20 degrees C. optimum growth
temp is 15 degrees. Found in arctic, antarctic, and ocean depths
thermophiles - CORRECT ANSWER-Heat-loving microbes.
general growth range 45 c to 80 c
hyperthermophiles - CORRECT ANSWER-Archaea growing about 80 degrees celcius and some
above 100 degrees celcius
mesophiles - CORRECT ANSWER-those growing best between 20 degrees and 40 degrees
celcius; the human pathogens are in this group
-majority of medically significant organisms
acidophiles - CORRECT ANSWER-grow in acidic environments
Alkalinophiles - CORRECT ANSWER-grow at extreme alkaline pH
,barophiles - CORRECT ANSWER-can survive under extreme pressure and will rupture if exposed
to normal atmospheric pressure
Halophiles - CORRECT ANSWER-"salt-loving" archaea that live in environments that have very
high salt concentrations
aerobes - CORRECT ANSWER-Bacteria that require oxygen to grow
anaerobes - CORRECT ANSWER-Bacteria that grow in the absence of oxygen and are destroyed
by oxygen
facultative - CORRECT ANSWER-makes ATP by aerobic respiration if oxygen is present, but is
capable of switching to fermentation or anaerobic respiration if oxygen is absen
obligate - CORRECT ANSWER-cannot make ATP in the absence of oxygen, and die in the
presence of oxygen
aerotolerant - CORRECT ANSWER-do not utilize oxygen but can survive and grow in its presence
Microaerophiles - CORRECT ANSWER-can use oxygen only when it is present at levels reduced
from that in air (lower than air)
Symbiosis - CORRECT ANSWER-A close relationship between two species that benefits at least
one of the species.
Mutualism - CORRECT ANSWER-A relationship between two species in which both species
benefit
, commensalism - CORRECT ANSWER-A relationship between two organisms in which one
organism benefits and the other is unaffected
Parasitism - CORRECT ANSWER-A relationship between two organisms of different species
where one benefits and the other is harmed
lag phase of bacterial growth - CORRECT ANSWER-The first phase of the bacterial growth curve,
in which organisms acclimate to their surrounding; they grow in size but do not increase in
number.
log/exponential growth phase - CORRECT ANSWER-- cells reach the maximum rate of cell
division.
- curve increases as long as cells have adequate nutrients and the environment is favorable.
stationary phase of bacterial growth - CORRECT ANSWER-The third of the four phases of the
bacterial growth curve, in which new cells are produced at the same rate as the old cells die,
leaving the number of live cells constant.
death phase of bacterial growth - CORRECT ANSWER-as resources become insufficient, bacteria
die off
Metabolism - CORRECT ANSWER-All of the chemical reactions that occur within an organism
Anabolism - CORRECT ANSWER-requires energy input, assembles smaller molecules into large
macromolecules
Catabolism - CORRECT ANSWER-break the bonds of larger molecules, release energy
lowering activation energy - CORRECT ANSWER-An enzyme speeds up a reaction by
AND VERIFIED CORRECT
ANSWERS GRADED A+
[LATEST 2026-2027] 100%
GUARANTEED PASS
psychrophiles - CORRECT ANSWER-Cold-loving Microbes. 0-20 degrees C. optimum growth
temp is 15 degrees. Found in arctic, antarctic, and ocean depths
thermophiles - CORRECT ANSWER-Heat-loving microbes.
general growth range 45 c to 80 c
hyperthermophiles - CORRECT ANSWER-Archaea growing about 80 degrees celcius and some
above 100 degrees celcius
mesophiles - CORRECT ANSWER-those growing best between 20 degrees and 40 degrees
celcius; the human pathogens are in this group
-majority of medically significant organisms
acidophiles - CORRECT ANSWER-grow in acidic environments
Alkalinophiles - CORRECT ANSWER-grow at extreme alkaline pH
,barophiles - CORRECT ANSWER-can survive under extreme pressure and will rupture if exposed
to normal atmospheric pressure
Halophiles - CORRECT ANSWER-"salt-loving" archaea that live in environments that have very
high salt concentrations
aerobes - CORRECT ANSWER-Bacteria that require oxygen to grow
anaerobes - CORRECT ANSWER-Bacteria that grow in the absence of oxygen and are destroyed
by oxygen
facultative - CORRECT ANSWER-makes ATP by aerobic respiration if oxygen is present, but is
capable of switching to fermentation or anaerobic respiration if oxygen is absen
obligate - CORRECT ANSWER-cannot make ATP in the absence of oxygen, and die in the
presence of oxygen
aerotolerant - CORRECT ANSWER-do not utilize oxygen but can survive and grow in its presence
Microaerophiles - CORRECT ANSWER-can use oxygen only when it is present at levels reduced
from that in air (lower than air)
Symbiosis - CORRECT ANSWER-A close relationship between two species that benefits at least
one of the species.
Mutualism - CORRECT ANSWER-A relationship between two species in which both species
benefit
, commensalism - CORRECT ANSWER-A relationship between two organisms in which one
organism benefits and the other is unaffected
Parasitism - CORRECT ANSWER-A relationship between two organisms of different species
where one benefits and the other is harmed
lag phase of bacterial growth - CORRECT ANSWER-The first phase of the bacterial growth curve,
in which organisms acclimate to their surrounding; they grow in size but do not increase in
number.
log/exponential growth phase - CORRECT ANSWER-- cells reach the maximum rate of cell
division.
- curve increases as long as cells have adequate nutrients and the environment is favorable.
stationary phase of bacterial growth - CORRECT ANSWER-The third of the four phases of the
bacterial growth curve, in which new cells are produced at the same rate as the old cells die,
leaving the number of live cells constant.
death phase of bacterial growth - CORRECT ANSWER-as resources become insufficient, bacteria
die off
Metabolism - CORRECT ANSWER-All of the chemical reactions that occur within an organism
Anabolism - CORRECT ANSWER-requires energy input, assembles smaller molecules into large
macromolecules
Catabolism - CORRECT ANSWER-break the bonds of larger molecules, release energy
lowering activation energy - CORRECT ANSWER-An enzyme speeds up a reaction by
