Portage Learning BIOD 171 Microbiology Final
Assessment | Real Questions & Accurate Answers |
Latest 2026 Exam Prep
1. Each of the following statements about measles, mumps, and rubella is true,
except:
Immunity provided by inoculation with a vaccine
Infect the CNS (central nervous system), leading to temporary or
permanent paralysis.
Caused by linear, single-stranded enveloped RNA virus
Spread via airborne particles while coughing, sneezing, etc.
2. The manifestations of a disease are best defined as the:
factors that precipitate an acute episode of a chronic illness.
early indicators of the prodromal stage of infection.
signs and symptoms of a disease.
subjective feelings of discomfort during a chronic illness.
3. Describe the significance of MacConkey Agar in microbiological studies.
MacConkey Agar is primarily used for growing fungi.
MacConkey Agar is significant because it selectively grows Gram-
negative bacteria and differentiates lactose fermenters from non-
fermenters.
MacConkey Agar is used to grow all types of bacteria without
differentiation.
MacConkey Agar is only used for identifying viruses.
,4. Which obligate intracellular bacterium is the #1 sexually transmitted disease
in the U.S and throughout to be the main cause of female infertility ?
Coxiella burnetii
Chlamydia trachomatis
Bdellovibrio exovorus
Mycoplasma genitalium
Rickettsia prowazekii
5. If a cell is unable to perform the Electron Transport System, what would be
the most likely consequence for the cell's energy production?
The cell would rely solely on anaerobic respiration.
The cell would produce significantly less ATP.
The cell would enhance its protein synthesis.
The cell would increase its glucose uptake.
6. Strep pharyngitis can progress to:
Scarlett fever
Rheumatic fever
Both
7. What are the manifestations of disease?
Signs
Symptoms
Syndromes
None of the above
, All of the above
8. If a laboratory technician accidentally skips the alcohol step during Gram
staining, what would be the likely outcome in terms of bacterial
classification?
All bacteria will be stained equally.
Gram-negative bacteria will retain the crystal violet stain.
The staining process will be ineffective.
Gram-positive bacteria may appear as Gram-negative.
9. Columbia CNA agar is useful for:
Isolating Gram-negative bacteria
Determining if the bacterium ferments lactose
Isolating Gram-positive bacteria
10. Describe the role of agar in microbiological growth media.
Agar is used to stain bacterial cells for visualization.
Agar serves as a solidifying agent that provides a stable surface for
microbial growth.
Agar prevents contamination in microbial cultures.
Agar acts as a nutrient source for bacteria.
11. How does Mycobacterium tuberculosis spread?
From shaking hands with an infected person
From touching surfaces contaminated with the bacteria
Through blood contamination
, From person to person through the air.
Through kissing
12. Which of the following interactions with an infected individual can spread
tuberculosis (TB)?
Shaking the individual's hand
Exposure to the individual's cough or sneeze
Sharing a meal with the individual
Touching the toilet seat used by the infected person
13. What STD is caused by gram-negative, non-motile, rod-shaped bacteria that
can cause infertility and pelvic inflammatory disease?
leprosy
syphilis
chlamydia
gonorrhea
14. Describe the appearance of colonies on Blood Agar Plates (BAP) for
microbes that do not exhibit hemolytic activity.
The colonies appear green on a yellow background.
The colonies appear transparent on a clear background.
The colonies appear white/tan on a red background.
The colonies appear black on a brown background.
Assessment | Real Questions & Accurate Answers |
Latest 2026 Exam Prep
1. Each of the following statements about measles, mumps, and rubella is true,
except:
Immunity provided by inoculation with a vaccine
Infect the CNS (central nervous system), leading to temporary or
permanent paralysis.
Caused by linear, single-stranded enveloped RNA virus
Spread via airborne particles while coughing, sneezing, etc.
2. The manifestations of a disease are best defined as the:
factors that precipitate an acute episode of a chronic illness.
early indicators of the prodromal stage of infection.
signs and symptoms of a disease.
subjective feelings of discomfort during a chronic illness.
3. Describe the significance of MacConkey Agar in microbiological studies.
MacConkey Agar is primarily used for growing fungi.
MacConkey Agar is significant because it selectively grows Gram-
negative bacteria and differentiates lactose fermenters from non-
fermenters.
MacConkey Agar is used to grow all types of bacteria without
differentiation.
MacConkey Agar is only used for identifying viruses.
,4. Which obligate intracellular bacterium is the #1 sexually transmitted disease
in the U.S and throughout to be the main cause of female infertility ?
Coxiella burnetii
Chlamydia trachomatis
Bdellovibrio exovorus
Mycoplasma genitalium
Rickettsia prowazekii
5. If a cell is unable to perform the Electron Transport System, what would be
the most likely consequence for the cell's energy production?
The cell would rely solely on anaerobic respiration.
The cell would produce significantly less ATP.
The cell would enhance its protein synthesis.
The cell would increase its glucose uptake.
6. Strep pharyngitis can progress to:
Scarlett fever
Rheumatic fever
Both
7. What are the manifestations of disease?
Signs
Symptoms
Syndromes
None of the above
, All of the above
8. If a laboratory technician accidentally skips the alcohol step during Gram
staining, what would be the likely outcome in terms of bacterial
classification?
All bacteria will be stained equally.
Gram-negative bacteria will retain the crystal violet stain.
The staining process will be ineffective.
Gram-positive bacteria may appear as Gram-negative.
9. Columbia CNA agar is useful for:
Isolating Gram-negative bacteria
Determining if the bacterium ferments lactose
Isolating Gram-positive bacteria
10. Describe the role of agar in microbiological growth media.
Agar is used to stain bacterial cells for visualization.
Agar serves as a solidifying agent that provides a stable surface for
microbial growth.
Agar prevents contamination in microbial cultures.
Agar acts as a nutrient source for bacteria.
11. How does Mycobacterium tuberculosis spread?
From shaking hands with an infected person
From touching surfaces contaminated with the bacteria
Through blood contamination
, From person to person through the air.
Through kissing
12. Which of the following interactions with an infected individual can spread
tuberculosis (TB)?
Shaking the individual's hand
Exposure to the individual's cough or sneeze
Sharing a meal with the individual
Touching the toilet seat used by the infected person
13. What STD is caused by gram-negative, non-motile, rod-shaped bacteria that
can cause infertility and pelvic inflammatory disease?
leprosy
syphilis
chlamydia
gonorrhea
14. Describe the appearance of colonies on Blood Agar Plates (BAP) for
microbes that do not exhibit hemolytic activity.
The colonies appear green on a yellow background.
The colonies appear transparent on a clear background.
The colonies appear white/tan on a red background.
The colonies appear black on a brown background.
