The concept of treating all samples, whether known or unknown, as potentially hazardous (or pathogenic) materials is known as _____. correct answers universal precautions
List at least 3 observations a researchers would be sure to note while assessing an unknown microbial sample. correct answers...
MODULE 5 EXAM - BIO171 MICROBIO || ALL
QUESTIONS ANSWERED CORRECTLY.
The concept of treating all samples, whether known or unknown, as potentially hazardous (or
pathogenic) materials is known as _____. correct answers universal precautions
List at least 3 observations a researchers would be sure to note while assessing an unknown
microbial sample. correct answers size and shape, motility, gram status, color change, chemical
reactions
While observing an unknown sample of limited amounts, a researcher must determine motility
and Gram status using the same sample. What would you determine first and why? correct
answers Motility because Gram staining requires the sample be fixed which would kill the
organism and then you can't observe motility
a Facultative anaerobe is a microorganism capable of growth under what conditions? correct
answers A microorganism capable of growth under aerobic and anaerobic conditions
as streptococcus is catalase negative would it thrive or die in the presence of peroxides? Why?
correct answers strep would not survive in the presence of peroxides b/c it is unable to
breakdown peroxides
strep is most often streaked onto:
1.) chocolate agar
2.) EMB agar
3.) Blood agar
4.) Spirit blue agar correct answers blood agar
True or false: the Lancefield groups are used to subdivide antigenic groups of alpha-hemolytic
Steptococcus correct answers false
The distinctions for Lancefield groupings lie in its correct answers Carbohydrate composition of
antigens
left untreated, strep throat can progress to___, which displays ___ hemolytic activity. correct
answers Rheumatic fever ; beta
Rheumatic fever displays (blank) hemolytic activity and occurs when (blank) is left untreated
correct answers Beta, strep
True or false: under most circumstances, staphylococcus can be found in ~80% of the human
population where it remains non-symptomatic correct answers false
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