BIOD 171 COMPREHENSIVE EXAM
FINAL EXAM
GENEVA COLLEGE
,THIS DOCUMENT CONSISTS OF THE
FOLLOWING :
BIOD 171 Final Exam
True & False Questions
Multiple Choice Questions and Answers
Clear images
Expert-Verified Explanations
BIOD 171 FINAL COMPREHENSIVE EXAM
,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
GENEVA COLLEGE
,THIS DOCUMENT CONSISTS OF THE
FOLLOWING :
BIOD 171 Final Exam
True & False Questions
Multiple Choice Questions and Answers
Clear images
Expert-Verified Explanations
BIOD 171 FINAL COMPREHENSIVE EXAM
,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.
---
