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BIOS 280 LAB| Quiz Questions/ Final Exam Preparation 100% Solved
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BIOS 280 LAB| Quiz Questions/ Final Exam Preparation 100% Solved
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BIOS 280 LAB| Quiz Questions/ Final Exam Preparation100% Solved
T/F: Bacterial and fungal colonies are easily distinguished by their appearance on trypticase
soy agar (TSA) plates Correct Ans-True
T/F: When moving from a low power objective lens to a higher power objective lens, the field
of view that is observed decreases Correct Ans-True
T/F: A turbid broth culture indicates bacterial growth Correct Ans-True
T/F: Heat fixation is an important part of the preparation of a bacterial smear Correct Ans-
True
T/F: Microorganisms are ubiquitous and can be isolated from soil, water, plants, and animals
Correct Ans-True
T/F: A contaminated culture contains two or more known bacterial species Correct Ans-
False
, BIOS 280 LAB| Quiz Questions/ Final Exam Preparation
100% Solved
T/F: Most bacterial cell surfaces are negatively charged and basic stains that are positively
charged easily color the cells Correct Ans-True
What are the reagents needed for the Gram stain procedure? Correct Ans-Iodine, Crystal
Violet, Alcohol, Safarin
T/F: The potassium hydroxide (KOH) or string test distinguishes between Gram-positive and
Gram-negative bacteria Correct Ans-True
T/F: A positive string test indicates a Gram negative bacterium Correct Ans-True
T/F: A coverslip is required to view a Gram stained slide Correct Ans-False
The lens which is located directly above the microscope stage is called the Correct Ans-
objective
If a medium contains an enzymatic digest of casein and soy, it would be considered Correct
Ans-undefined (complex) medium
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