BIOD 171 MODULE 5 ESSENTIAL
MICROBIOLOGY EXAM PREP QUESTIONS
ANSWERS BUNDLED SOLUTIONS HIGH
QUALITY PRACTICE MATERIAL
●● 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
●● 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
●● a Facultative anaerobe is a microorganism capable of growth under
what conditions?
Answer: 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?
, Answer: 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
Answer: blood agar
●● True or false: the Lancefield groups are used to subdivide antigenic
groups of alpha-hemolytic Steptococcus
Answer: false
●● The distinctions for Lancefield groupings lie in its
Answer: Carbohydrate composition of antigens
●● left untreated, strep throat can progress to___, which displays ___
hemolytic activity.
Answer: Rheumatic fever ; beta
MICROBIOLOGY EXAM PREP QUESTIONS
ANSWERS BUNDLED SOLUTIONS HIGH
QUALITY PRACTICE MATERIAL
●● 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
●● 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
●● a Facultative anaerobe is a microorganism capable of growth under
what conditions?
Answer: 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?
, Answer: 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
Answer: blood agar
●● True or false: the Lancefield groups are used to subdivide antigenic
groups of alpha-hemolytic Steptococcus
Answer: false
●● The distinctions for Lancefield groupings lie in its
Answer: Carbohydrate composition of antigens
●● left untreated, strep throat can progress to___, which displays ___
hemolytic activity.
Answer: Rheumatic fever ; beta
