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CSN BIO 251 LAB FINAL EXAM|QUESTIONS AND 100% CORRECT WELL DETAILED ANSWERS|LATEST UPDATE!!!2025/2026|GUARANTEED PASS|GRADED A+

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CSN BIO 251 LAB FINAL EXAM|QUESTIONS AND 100% CORRECT WELL DETAILED ANSWERS|LATEST UPDATE!!!2025/2026|GUARANTEED PASS|GRADED A+

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CORRECT WELL DETAILED ANSWERS|LATEST
UPDATE!!!2025/2026|GUARANTEED PASS|GRADED

Optimum - ANSWER The temperature at which the organism grows best over time is
___________________.



Minimum - ANSWER The temperature, below which the organism cannot grow is
called the __________________.



Maximum - ANSWER The temperature, above which the organism cannot grow is
called the _________________.



Turbidity - ANSWER The optimum temperature of growth may be observed in broth
cultures as measures of _____________________.



absorbance - ANSWER The turbidity is measured by ___________________.



spectrophotometer - ANSWER What tool is used to measure the turbidity?



proportional - ANSWER The higher the absorbance of light, the higher the growth, i.e.
they are ______________________.



Optical Density - ANSWER As cells grow, more light is absorbed, and the higher the
absorbance reading, this is also referred to as what?



Psychrophiles - ANSWER Organisms that grow only below 20 degrees C are classified
as _________________________.



1

, Psychrotrophs - ANSWER Organisms that live in the cold but can also grow up to 35
degrees C and slightly higher, are classified as _____________________.



Mesophiles - ANSWER Microbes that are adapted to temperatures between 15
degrees C and 45 degrees C are classified as ________________________.



thermophiles - ANSWER Organisms growing above 45 degrees C - 80 degrees C are
classified as _________________________.



extream thermophiles - ANSWER Microbes growing above 80 degrees C up to 110
degrees C are ___________________ _____________________.



thermoduric - ANSWER These bacteria generally are mesophiles that endure high
temperatures for short periods of time.



E. coli and Bacillus stearothermophilus - ANSWER What two bacterial cultures were
used for the Growth Factors Temperature Lab?



4, 25, 36, 55 - ANSWER What were the four temperatures the bacteria were kept at for
the Growth Factors Temperature lab?



absorbance - ANSWER The objective of the Growth Factors Temperature Lab is to
quantify the amount of turbidity and therefore the amount of bacterial growth by obtaining
an _______________________ value for each nutrient broth.



550 nm - ANSWER What is the wavelength used to measure the absorbance of the
bacteria of the Growth Factors Temperature Lab?




2

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