PORTAGE MICROBIOLOGY BIOD171 FINAL EXAM
COMPREHENSIVE COURSE ASSESSMENT // A+ GRADED
PRESENTATION // ESSENTIAL MICRObial STRUCTURE
FUNCTION PATHOGENESIS IMMUNOLOGY AND LAB
APPLICATIONS FOR COMPLETE STUDENT MASTERY //
ACADEMIC YEAR 2025/2026
Describe TWO differences between DNA and RNA. - THE CORRECT
ANSWER -Answer: Any of the following are acceptable answers: RNA
contains the sugar ribose rather than deoxyribose. RNA is always single-
stranded, whereas DNA is double-stranded. While RNA contains the
bases adenine, guanine, and cytosine, it does not utilize the pyrimidine
base thymine. Instead, RNA contains uracil (U), which still pairs with
adenine (A).
True or False. If the statement is false, change it to make it true.
When grown on Blood Agar Plates (BAP), microbes capable of delta
hemolysis designate the absence or lack of hemolytic activity, and the
resulting colonies are often white/tan in color growing on the red
background color of the unaffected blood agar plate. - THE CORRECT
ANSWER -Answer: False; Gamma Hemolysis designates the absence
or lack of hemolytic activity, and the resulting colonies are often
white/tan in color growing on the red background color of the unaffected
blood agar plate.
Each of the following statements about the Electron Transport System is
true, except: - THE CORRECT ANSWER -Occurs mainly in the nuclear
membrane of the cell
Describe the TWO main characteristics of LYSOGENIC (temperate)
bacteriophage replication. - THE CORRECT ANSWER -(1) Exist in a
non-replicative state that does not kill the host cell
(2) Integrated into the host genome but production of viral proteins is
suppressed
, Bacteria that have a round morphology are referred to as ______. - THE
CORRECT ANSWER -Coccus
You want to observe the movement of microorganisms that are present
in a sample of cheek cells obtained on a patient. Briefly explain the
technique that you would use and how it is performed. - THE CORRECT
ANSWER -A wet mount stain is indicated. A small liquid culture (usually
just a drop) containing a microorganism of interest is prepared, added to
a slide, and then covered with a glass coverslip. The coverslip is present
to both protect the objective and the specimen while also holding the
microorganism in place. Wet mounts are used to observe the motility
and behavior of an organism.
What coronavirus-associated infection gave rise to quarantining and
travel restrictions in 2003? - THE CORRECT ANSWER -SARS
Also known as lysogeny broth, it is a multi-purpose media capable of
growing a wide variety of microorganisms. - THE CORRECT ANSWER -
LB Agar
Red in color and is both a selective and differential media. This agar is
selective for Gram-positive bacteria and can differentiate members of
the Staphylococci family. - THE CORRECT ANSWER -Mannitol Salt
Agar
Pale red in color and is both selective and differential media. The
presence of crystal violet and bile salts in its formulation restricts Gram-
positive bacterial growth. As such, only Gram-negative microbes can be
grown. - THE CORRECT ANSWER -MacConkey Agar
Red in color and is an enriched, selective, and differential media. It
contains the antimicrobial agents colistin and Nalidixic acid, it
suppresses the growth of Gram-negative bacteria and is, therefore, used
COMPREHENSIVE COURSE ASSESSMENT // A+ GRADED
PRESENTATION // ESSENTIAL MICRObial STRUCTURE
FUNCTION PATHOGENESIS IMMUNOLOGY AND LAB
APPLICATIONS FOR COMPLETE STUDENT MASTERY //
ACADEMIC YEAR 2025/2026
Describe TWO differences between DNA and RNA. - THE CORRECT
ANSWER -Answer: Any of the following are acceptable answers: RNA
contains the sugar ribose rather than deoxyribose. RNA is always single-
stranded, whereas DNA is double-stranded. While RNA contains the
bases adenine, guanine, and cytosine, it does not utilize the pyrimidine
base thymine. Instead, RNA contains uracil (U), which still pairs with
adenine (A).
True or False. If the statement is false, change it to make it true.
When grown on Blood Agar Plates (BAP), microbes capable of delta
hemolysis designate the absence or lack of hemolytic activity, and the
resulting colonies are often white/tan in color growing on the red
background color of the unaffected blood agar plate. - THE CORRECT
ANSWER -Answer: False; Gamma Hemolysis designates the absence
or lack of hemolytic activity, and the resulting colonies are often
white/tan in color growing on the red background color of the unaffected
blood agar plate.
Each of the following statements about the Electron Transport System is
true, except: - THE CORRECT ANSWER -Occurs mainly in the nuclear
membrane of the cell
Describe the TWO main characteristics of LYSOGENIC (temperate)
bacteriophage replication. - THE CORRECT ANSWER -(1) Exist in a
non-replicative state that does not kill the host cell
(2) Integrated into the host genome but production of viral proteins is
suppressed
, Bacteria that have a round morphology are referred to as ______. - THE
CORRECT ANSWER -Coccus
You want to observe the movement of microorganisms that are present
in a sample of cheek cells obtained on a patient. Briefly explain the
technique that you would use and how it is performed. - THE CORRECT
ANSWER -A wet mount stain is indicated. A small liquid culture (usually
just a drop) containing a microorganism of interest is prepared, added to
a slide, and then covered with a glass coverslip. The coverslip is present
to both protect the objective and the specimen while also holding the
microorganism in place. Wet mounts are used to observe the motility
and behavior of an organism.
What coronavirus-associated infection gave rise to quarantining and
travel restrictions in 2003? - THE CORRECT ANSWER -SARS
Also known as lysogeny broth, it is a multi-purpose media capable of
growing a wide variety of microorganisms. - THE CORRECT ANSWER -
LB Agar
Red in color and is both a selective and differential media. This agar is
selective for Gram-positive bacteria and can differentiate members of
the Staphylococci family. - THE CORRECT ANSWER -Mannitol Salt
Agar
Pale red in color and is both selective and differential media. The
presence of crystal violet and bile salts in its formulation restricts Gram-
positive bacterial growth. As such, only Gram-negative microbes can be
grown. - THE CORRECT ANSWER -MacConkey Agar
Red in color and is an enriched, selective, and differential media. It
contains the antimicrobial agents colistin and Nalidixic acid, it
suppresses the growth of Gram-negative bacteria and is, therefore, used
