UNIT 4 — MILESTONE 4
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BIO 250 RETAKE EXAM 2024 (UNIT 4-MILESTONE 4) WITH ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS GRADED A +/ BIO 250 RETAKE EXAM
1
In which environment would you find an extreme halophile?
The Dead Sea, one of the saltiest water bodies worldwide
Your low-pH stomach
An undisturbed bog with no oxygen
The bottom of the ocean
RATIONALE
Extreme halophiles are organisms that can thrive in extremely high salinity conditions, such as in the Dead Sea.
CONCEPT
Environmental Effects on Microbial Growth 1 / 2
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What chemical would be used to preserve food products by inhibiting the synthesis of microbial cell walls?
Carbon dioxide
Sodium benzoate
Sorbic acid
Nisin
RATIONALE
Nisin is a type of natural food preservative that controls microbial growth by inhibiting the cell wall synthesis of microbes.
CONCEPT
Chemical Control of Microorganisms
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3
What does it mean if a microbe is able to undergo drug modification?
UNIT 4 — MILESTONE 4
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