BIOD 171 Portage Learning Final Exam Questions | Actual
Exam Questions & 100% Correct Answers | Latest Update
2026 | Biology Exam Prep
1. You are concerned for a friend who went camping in the CA mountains, and
was bitten by several ticks of the sort shown in the image, below. Your friend
has since developed a "bullseye" rash.
What is the name of the pathogen and of the disease that your friend may
have contracted from the tick bites?
Trypanosoma cruzi; Chagas disease
Borrelia burgdorferi; Lyme disease
Rickettsia rickettsii; Rocky Mountain Spotted Fever
Yersinia pestis; Black Plague
2. Which of the following organisms is known to contain chloroplasts?
Fungi
Viruses
Plants
Bacteria
3. If a laboratory technician mistakenly skips the decolorization step during the
Gram Staining process, what would be the expected outcome for Gram-
Negative bacteria?
They would remain colorless as expected.
, They would appear blue instead of colorless.
They would appear purple instead of colorless.
They would appear pink instead of colorless.
4. Describe the significance of using a quadrant streak method in isolating
bacterial colonies.
The quadrant streak method is important for measuring bacterial
resistance.
The quadrant streak method is significant because it allows for the
isolation of individual bacterial colonies from a mixed population,
facilitating further study.
The quadrant streak method is used to determine the size of bacterial
colonies.
The quadrant streak method is primarily used for staining bacteria.
5. What type of stain is used to identify malaria in blood samples?
Gram stain
Hematoxylin and eosin stain
Giemsa stain
Acid-fast stain
6. Which of the following is a function of the ribosome? I. bind mRNA and allow
codon recognition II. mediate the binding of proteins necessary for initiation,
elongation, and termination III. catalyze synthesis of peptide bonds IV.
translocates such that multiple codons can be read
I, IV
I only
, I, II, III, IV
I, II
II only
7. Shingles is a medical condition that usually occurs years after chickenpox,
even though no illness is present in the intervening period of time. This occurs
because the varicella zoster virus is capable of _ _.
latent infection
oncogenic infection
lytic infection
persistant infection
lysogenic infection
8. On a streak plate, what streak has the lowest concentration of bacteria?
4th. streak
2nd streak
1st streak
3rd streak
9. Chloroplasts exist in which of the following?
Plants and algae
Animals and plants
Animals only
Animals and algae
, 10. If a plant's ability to perform photophosphorylation is impaired, what
immediate effect would this have on its metabolic processes?
Increased oxygen production and enhanced growth.
Reduced energy production and decreased synthesis of organic
molecules.
Increased production of ATP and NADPH.
No effect on energy production but increased CO2 absorption.
11. Which of the following best describes photophosphorylation during the light
reactions?
ATP is produced through an electron transport chain and
chemiosmosis
NADPH is produced through a reduction of NADP+
ATP is produced through substrate level phosphorylation
NADPH is produced through oxidation of NADP+
12. Describe the relationship between vaccination and the prevention of
tetanus.
Vaccination is only effective if given after exposure to the bacteria.
Vaccination provides immunity against tetanus, preventing the
disease.
Vaccination has no effect on tetanus prevention.
Vaccination cures tetanus after infection.
13. What color do Gram-Negative bacteria appear after the decolorization step
in the Gram Stain procedure?
Exam Questions & 100% Correct Answers | Latest Update
2026 | Biology Exam Prep
1. You are concerned for a friend who went camping in the CA mountains, and
was bitten by several ticks of the sort shown in the image, below. Your friend
has since developed a "bullseye" rash.
What is the name of the pathogen and of the disease that your friend may
have contracted from the tick bites?
Trypanosoma cruzi; Chagas disease
Borrelia burgdorferi; Lyme disease
Rickettsia rickettsii; Rocky Mountain Spotted Fever
Yersinia pestis; Black Plague
2. Which of the following organisms is known to contain chloroplasts?
Fungi
Viruses
Plants
Bacteria
3. If a laboratory technician mistakenly skips the decolorization step during the
Gram Staining process, what would be the expected outcome for Gram-
Negative bacteria?
They would remain colorless as expected.
, They would appear blue instead of colorless.
They would appear purple instead of colorless.
They would appear pink instead of colorless.
4. Describe the significance of using a quadrant streak method in isolating
bacterial colonies.
The quadrant streak method is important for measuring bacterial
resistance.
The quadrant streak method is significant because it allows for the
isolation of individual bacterial colonies from a mixed population,
facilitating further study.
The quadrant streak method is used to determine the size of bacterial
colonies.
The quadrant streak method is primarily used for staining bacteria.
5. What type of stain is used to identify malaria in blood samples?
Gram stain
Hematoxylin and eosin stain
Giemsa stain
Acid-fast stain
6. Which of the following is a function of the ribosome? I. bind mRNA and allow
codon recognition II. mediate the binding of proteins necessary for initiation,
elongation, and termination III. catalyze synthesis of peptide bonds IV.
translocates such that multiple codons can be read
I, IV
I only
, I, II, III, IV
I, II
II only
7. Shingles is a medical condition that usually occurs years after chickenpox,
even though no illness is present in the intervening period of time. This occurs
because the varicella zoster virus is capable of _ _.
latent infection
oncogenic infection
lytic infection
persistant infection
lysogenic infection
8. On a streak plate, what streak has the lowest concentration of bacteria?
4th. streak
2nd streak
1st streak
3rd streak
9. Chloroplasts exist in which of the following?
Plants and algae
Animals and plants
Animals only
Animals and algae
, 10. If a plant's ability to perform photophosphorylation is impaired, what
immediate effect would this have on its metabolic processes?
Increased oxygen production and enhanced growth.
Reduced energy production and decreased synthesis of organic
molecules.
Increased production of ATP and NADPH.
No effect on energy production but increased CO2 absorption.
11. Which of the following best describes photophosphorylation during the light
reactions?
ATP is produced through an electron transport chain and
chemiosmosis
NADPH is produced through a reduction of NADP+
ATP is produced through substrate level phosphorylation
NADPH is produced through oxidation of NADP+
12. Describe the relationship between vaccination and the prevention of
tetanus.
Vaccination is only effective if given after exposure to the bacteria.
Vaccination provides immunity against tetanus, preventing the
disease.
Vaccination has no effect on tetanus prevention.
Vaccination cures tetanus after infection.
13. What color do Gram-Negative bacteria appear after the decolorization step
in the Gram Stain procedure?
