Microbes Exam #4 Questions And Answers
2026 Update!!!
Physical Requirements: water, temperature
(can’t be too cold or too hot, but some archaea
can survive in extreme environments), oxygen
(aerobes require oxygen for cellular respiration,
while anaerobes will die in the presence of the
Though some are extreme, most cells have
gas - facultative organisms can grow with or
similar physical and chemical requirements.
without oxygen), pH (most organisms have an
Compare physical and chemical requirements in
optimal pH as well as pH range where growth
general.
will be hindered) salt, and radiation. Chemical
Requirements for Metabolism: energy,
enzymes, organic macromolecules
(carbohydrates, proteins, lipids), inorganic
molecules (water, vitamins, minerals)
Can be classified as psychrophiles,
psychrotrophs, mesophiles, thermophiles, and
hyperthermophiles. Psychrophiles are
organisms that live at cold temperature ranges
-8*C (18*F) and 20*C (68*F) and can be found on
the ocean floor or in Antarctic and Arctic
environments. Psychrotrophs are organisms
that live at cold temperature ranges (4*C - 5*C/
39*F - 41*F) and grow well in refrigerator temps.
Mesophiles are organisms that live at ambient
For the physical requirements, how do we temperature ranges 10*C (50*F) and 45*C
classify microbes based on Temperature? (113*F) and are found in aquatic and soil
environments in temperate and tropical regions
around the world; most human pathogens are
mesophiles. Thermophiles are organisms that
live at high temperature ranges 40*C (104*F)
and higher and thrive in compost heaps, and
hot springs. Hyperthermophiles are prokaryotic
organisms that have an optimal growth
temperature above 100*C (212*F) and even
above 121*C (250*F) and are found in hot-water
vents in the Pacific Ocean floor.
, For the physical requirements, how do we Can be classified as Neutrophiles, Acidophiles,
classify microbes based on pH? Extreme Acidophiles, and Alkaliphiles.
Neutrophiles are most common with a pH
2026 Update!!!
Physical Requirements: water, temperature
(can’t be too cold or too hot, but some archaea
can survive in extreme environments), oxygen
(aerobes require oxygen for cellular respiration,
while anaerobes will die in the presence of the
Though some are extreme, most cells have
gas - facultative organisms can grow with or
similar physical and chemical requirements.
without oxygen), pH (most organisms have an
Compare physical and chemical requirements in
optimal pH as well as pH range where growth
general.
will be hindered) salt, and radiation. Chemical
Requirements for Metabolism: energy,
enzymes, organic macromolecules
(carbohydrates, proteins, lipids), inorganic
molecules (water, vitamins, minerals)
Can be classified as psychrophiles,
psychrotrophs, mesophiles, thermophiles, and
hyperthermophiles. Psychrophiles are
organisms that live at cold temperature ranges
-8*C (18*F) and 20*C (68*F) and can be found on
the ocean floor or in Antarctic and Arctic
environments. Psychrotrophs are organisms
that live at cold temperature ranges (4*C - 5*C/
39*F - 41*F) and grow well in refrigerator temps.
Mesophiles are organisms that live at ambient
For the physical requirements, how do we temperature ranges 10*C (50*F) and 45*C
classify microbes based on Temperature? (113*F) and are found in aquatic and soil
environments in temperate and tropical regions
around the world; most human pathogens are
mesophiles. Thermophiles are organisms that
live at high temperature ranges 40*C (104*F)
and higher and thrive in compost heaps, and
hot springs. Hyperthermophiles are prokaryotic
organisms that have an optimal growth
temperature above 100*C (212*F) and even
above 121*C (250*F) and are found in hot-water
vents in the Pacific Ocean floor.
, For the physical requirements, how do we Can be classified as Neutrophiles, Acidophiles,
classify microbes based on pH? Extreme Acidophiles, and Alkaliphiles.
Neutrophiles are most common with a pH
