BIOD 171 ESSENTIAL MICROBIOLOGY
FINAL EXAM
Actual Questions and Verified Answers
100% Guarantee Pass
Portage Learning, Geneva College
Inside you will get:
➢ BIOD 171 Final Exam
➢ True & False Questions
➢ Multiple Choice Questions and Answers
➢ Clear images
➢ Expert-Verified Explanations
,1. Match each of the following diseases to the correct bacterial family.
- Tetanus — Clostridium tetani
- Folliculitis — Staphylococcus aureus
- Pneumonic plague — Yersinia pestis
- Ophthalmia neonatorum — Neisseria gonorrhoeae
Expert Rationale:
Clostridium tetani produces neurotoxin causing tetanus. Staphylococcus
aureus causes skin infections like folliculitis. Yersinia pestis causes plague
including the pneumonic form. Ophthalmia neonatorum typically results
from Neisseria gonorrhoeae infection; Staphylococcus is generally not
responsible.
---
2. Describe the primary distinction between prokaryotic and
eukaryotic cells.
Correct Answer: Eukaryotic cells have a defined, membrane-bound
nucleus containing the genetic material, whereas prokaryotic cells lack a
nucleus and have their genetic material free-floating in the cytoplasm.
Expert Rationale: This fundamental structural difference dictates
compartmentalization of transcription and translation, organelle presence,
and complexity, making eukaryotes capable of more intricate regulation and
specialization.
---
,3. Match each of the following terms with the correct description.
- Phototroph — Utilize photons to generate energy
- Lithotroph — Remove electrons from inorganic molecules
- Autotroph — Obtain their source of carbon from CO2
- Chemotroph — Acquire energy from chemical compounds
Expert Rationale:
These classifications reflect microbial metabolic diversity: phototrophs
use light; lithotrophs use inorganic electron donors; autotrophs fix carbon
dioxide; chemotrophs obtain energy from chemical oxidation.
---
4. A researcher is looking to solidify an agent for growth media. What
polysaccharide substance would he or she use?
Correct Answer: Agar
Expert Rationale: Agar is a sulfated polysaccharide derived from red
algae, used as a solidifying agent in microbial culture media due to its high
melting point and inertness, supporting growth without degradation by most
bacteria.
5. The function of the ribosome is (select all that apply):
- Waste disposal via hydrolytic enzymes
- To produce energy (ATP)
, - Protein synthesis
- Lipid synthesis
- Protein modification and distribution
Correct answer:
- Protein synthesis
- Protein modification and distribution
Expert Rationale:
Ribosomes are responsible primarily for synthesizing proteins by
translating mRNA into polypeptide chains. While ribosomes do not directly
modify proteins, ribosomes associated with the rough ER facilitate entry of
nascent proteins into the ER, where protein folding and modifications
begin, linking them indirectly to protein modification pathways.
---
FINAL EXAM
Actual Questions and Verified Answers
100% Guarantee Pass
Portage Learning, Geneva College
Inside you will get:
➢ BIOD 171 Final Exam
➢ True & False Questions
➢ Multiple Choice Questions and Answers
➢ Clear images
➢ Expert-Verified Explanations
,1. Match each of the following diseases to the correct bacterial family.
- Tetanus — Clostridium tetani
- Folliculitis — Staphylococcus aureus
- Pneumonic plague — Yersinia pestis
- Ophthalmia neonatorum — Neisseria gonorrhoeae
Expert Rationale:
Clostridium tetani produces neurotoxin causing tetanus. Staphylococcus
aureus causes skin infections like folliculitis. Yersinia pestis causes plague
including the pneumonic form. Ophthalmia neonatorum typically results
from Neisseria gonorrhoeae infection; Staphylococcus is generally not
responsible.
---
2. Describe the primary distinction between prokaryotic and
eukaryotic cells.
Correct Answer: Eukaryotic cells have a defined, membrane-bound
nucleus containing the genetic material, whereas prokaryotic cells lack a
nucleus and have their genetic material free-floating in the cytoplasm.
Expert Rationale: This fundamental structural difference dictates
compartmentalization of transcription and translation, organelle presence,
and complexity, making eukaryotes capable of more intricate regulation and
specialization.
---
,3. Match each of the following terms with the correct description.
- Phototroph — Utilize photons to generate energy
- Lithotroph — Remove electrons from inorganic molecules
- Autotroph — Obtain their source of carbon from CO2
- Chemotroph — Acquire energy from chemical compounds
Expert Rationale:
These classifications reflect microbial metabolic diversity: phototrophs
use light; lithotrophs use inorganic electron donors; autotrophs fix carbon
dioxide; chemotrophs obtain energy from chemical oxidation.
---
4. A researcher is looking to solidify an agent for growth media. What
polysaccharide substance would he or she use?
Correct Answer: Agar
Expert Rationale: Agar is a sulfated polysaccharide derived from red
algae, used as a solidifying agent in microbial culture media due to its high
melting point and inertness, supporting growth without degradation by most
bacteria.
5. The function of the ribosome is (select all that apply):
- Waste disposal via hydrolytic enzymes
- To produce energy (ATP)
, - Protein synthesis
- Lipid synthesis
- Protein modification and distribution
Correct answer:
- Protein synthesis
- Protein modification and distribution
Expert Rationale:
Ribosomes are responsible primarily for synthesizing proteins by
translating mRNA into polypeptide chains. While ribosomes do not directly
modify proteins, ribosomes associated with the rough ER facilitate entry of
nascent proteins into the ER, where protein folding and modifications
begin, linking them indirectly to protein modification pathways.
---
