BIO 242 EXAM 2 (CHAMBERLAIN UNIVERSITY) QUESTIONS AND ANSWERS GRADED A+ 2025/2026

BIO 242 EXAM 2 (CHAMBERLAIN
UNIVERSITY) QUESTIONS AND
ANSWERS GRADED A+ 2025/2026




Chemotrophs - ANS Obtains energy from chemicals
Organic (organ)
Inorganic (Litho)


Phototrophs - ANS Obtains energy from sunlight or photosynthesis


Hetertrophs - ANS Obtain Carbon from organic molecules (proteins, nucleic acid, carbs &
lipids)


Autotroph - ANS Obtain carbon from inorganic molecules (CO2)


Chemoheterotroph - ANS An organism that gets their energy from chemicals and their
carbon from organic molecules.


Photoautotrophs - ANS photosynthetic organisms, such as algae, plants and most
cyanobacteria.


Photoheterotrophs - ANS An organism that obtains energy from sunlight and carbon from
organic sources.


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, Chemoautotrophs - ANS organic compounds ?


Saprobes - ANS Obtains nutrients from dead organisms.


Parasites - ANS Obtain nutrients from living organisms and cause harm to their host.


what several environmental factors are influenced on microbial growth ? - ANS - Temperature
- Gases (primarily oxygen)
- pH
- Osmotic pressure (involves hypertonic & hypotonic)
- Hydrostatic pressure (Involves Atmospheric pressure)


Psychrophiles - ANS - cold-loving microbes (0-15 degrees celsius)


Psychrotolerant - ANS Organisms that tolerate the cold, but grow slowly (15-30 degrees
celsius)


Mesophiles - ANS


Thermophiles - ANS heat loving microbes (50-60 C)


Extreme thermophiles - ANS thrive in very hot environments (above 125 C)


Obligate aerobes require - ANS oxygen and can NOT survive without it.


facultative anaerobes - ANS DOES NOT need oxygen but can tolerate it and grow in its
presence




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