Page | 1
module 5 exam - bio171 microbio
Questions with Detailed Verified
Answers
Question: The concept of treating all samples, whether known or unknown,
as potentially hazardous (or pathogenic) materials is known as _____.
Answer: universal precautions
Question:
List at least 3 observations a researchers would be sure to note while assessing
an unknown microbial sample.
Answer: size and shape, motility, gram status, color change, chemical
reactions
Question:
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?
Answer: Motility because Gram staining requires the sample be fixed which
would kill the organism and then you can't observe motility
Question:
a Facultative anaerobe is a microorganism capable of growth under what
conditions?
, Page | 2
Answer: A microorganism capable of growth under aerobic and anaerobic
conditions
Question:
as streptococcus is catalase negative would it thrive or die in the presence of
peroxides? Why?
Answer: strep would not survive in the presence of peroxides b/c it is unable
to breakdown peroxides
Question:
strep is most often streaked onto:
1.) chocolate agar
2.) EMB agar
3.) Blood agar
4.) Spirit blue agar
Answer: blood agar
Question:
True or false: the Lancefield groups are used to subdivide antigenic groups of
alpha-hemolytic Steptococcus
Answer: false
Question:
The distinctions for Lancefield groupings lie in its
module 5 exam - bio171 microbio
Questions with Detailed Verified
Answers
Question: The concept of treating all samples, whether known or unknown,
as potentially hazardous (or pathogenic) materials is known as _____.
Answer: universal precautions
Question:
List at least 3 observations a researchers would be sure to note while assessing
an unknown microbial sample.
Answer: size and shape, motility, gram status, color change, chemical
reactions
Question:
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?
Answer: Motility because Gram staining requires the sample be fixed which
would kill the organism and then you can't observe motility
Question:
a Facultative anaerobe is a microorganism capable of growth under what
conditions?
, Page | 2
Answer: A microorganism capable of growth under aerobic and anaerobic
conditions
Question:
as streptococcus is catalase negative would it thrive or die in the presence of
peroxides? Why?
Answer: strep would not survive in the presence of peroxides b/c it is unable
to breakdown peroxides
Question:
strep is most often streaked onto:
1.) chocolate agar
2.) EMB agar
3.) Blood agar
4.) Spirit blue agar
Answer: blood agar
Question:
True or false: the Lancefield groups are used to subdivide antigenic groups of
alpha-hemolytic Steptococcus
Answer: false
Question:
The distinctions for Lancefield groupings lie in its
