Microbiology Exam 5 Portage Learning
1. Define the concept of universal precautions. The concept is any and
all whether known or un-
known is treated haz-
ardous.
2. List at least 3 observations a researcher would be sure 1) size/shape
to note while assessing an unknown microbial sample. 2) motility
3) change in color
3. While observing an unknown sample of limited Motility 1 because gram
amounts, a researcher must determine the following staining is required pri-
observations: (1) the presence of any motility and (2) its or to killing the organism.
Gram status using the samesample—the liquid sample Gram stain the heat fixa-
cannot be divided. Which would you determine first tion kills it in process.
and why?
4. A facultative anaerobe is a microorganism capable of Both with and without oxy-
growth under what conditions? gen.
5. As Streptococcus is catalase negative would it thrive or Die because it is unable
die in the presence of peroxides? Why? to breakdown peroxides. If
left unchecked peroxides
would damage the cellular
integrity of strep causing
death.
6. Streptococcus is most often streaked onto: Blood agar
Blood Agar
EMB Agar
Sprite Blue Agar
Chocolate Agar
1/8
, Microbiology Exam 5 Portage Learning
7. The distinction for Lancefield subgroups lie in its (Se- B) Carbohydrate composi-
lect All that Apply) tion of antigen
A)Catlyse Activity
B)Carbohydrate composition of antigen
C)Hemotlyic Acitivty
D)All of the Above
8. True or False. The Lancefield groups are used to sub- False
divide antigenic groups of alpha-hemolytic Streptococ-
cus.
9. Greater than 90% of all human streptococcal infections Group A
belong to:
Group A
Group B
Group C
Group D
10. Rheumatic fever displays_____hemolytic activity and Beta, Strep, Pharyngitis
occurs when____is left untreated
11. Left untreated, strep throat can progress to ______ , Rheumatic fever; beta
which displays _____ hemolytic activity.
Strep, Septicemia, gamma
Rheumatic fever; beta
Strep, Pharyngitis; beta
Strep Pharyngitis, alpha
12. True or False. Under most circumstances, staphylococ- False
cus can be found in ~80% of human population where
it remains non-symptomatic.
2/8
1. Define the concept of universal precautions. The concept is any and
all whether known or un-
known is treated haz-
ardous.
2. List at least 3 observations a researcher would be sure 1) size/shape
to note while assessing an unknown microbial sample. 2) motility
3) change in color
3. While observing an unknown sample of limited Motility 1 because gram
amounts, a researcher must determine the following staining is required pri-
observations: (1) the presence of any motility and (2) its or to killing the organism.
Gram status using the samesample—the liquid sample Gram stain the heat fixa-
cannot be divided. Which would you determine first tion kills it in process.
and why?
4. A facultative anaerobe is a microorganism capable of Both with and without oxy-
growth under what conditions? gen.
5. As Streptococcus is catalase negative would it thrive or Die because it is unable
die in the presence of peroxides? Why? to breakdown peroxides. If
left unchecked peroxides
would damage the cellular
integrity of strep causing
death.
6. Streptococcus is most often streaked onto: Blood agar
Blood Agar
EMB Agar
Sprite Blue Agar
Chocolate Agar
1/8
, Microbiology Exam 5 Portage Learning
7. The distinction for Lancefield subgroups lie in its (Se- B) Carbohydrate composi-
lect All that Apply) tion of antigen
A)Catlyse Activity
B)Carbohydrate composition of antigen
C)Hemotlyic Acitivty
D)All of the Above
8. True or False. The Lancefield groups are used to sub- False
divide antigenic groups of alpha-hemolytic Streptococ-
cus.
9. Greater than 90% of all human streptococcal infections Group A
belong to:
Group A
Group B
Group C
Group D
10. Rheumatic fever displays_____hemolytic activity and Beta, Strep, Pharyngitis
occurs when____is left untreated
11. Left untreated, strep throat can progress to ______ , Rheumatic fever; beta
which displays _____ hemolytic activity.
Strep, Septicemia, gamma
Rheumatic fever; beta
Strep, Pharyngitis; beta
Strep Pharyngitis, alpha
12. True or False. Under most circumstances, staphylococ- False
cus can be found in ~80% of human population where
it remains non-symptomatic.
2/8
