BIOD 171 – Final Exam
Study Guide | 2026–2027
Description
This comprehensive set of 200 multiple-choice questions (MCQs) is designed for
revision of BIOD 171 – Microbiology. It covers key topics including microbial
structure, metabolism, genetics, growth, control of microorganisms, immunology,
and applied microbiology. Each question includes four options, with the correct
answer clearly marked ✅, and answers are randomized to avoid patterns.
Keywords
Microbiology, BIOD 171, MCQ, Final Exam, Revision, Bacteria, Viruses, Fungi,
Metabolism, Genetics, Immunology, Microbial Control, Antimicrobials, Sterilization,
Culture Media, Gram Stain, Prokaryotes, Eukaryotes, Pathogens, Host Defense
1. Question
Which of the following is a prokaryotic organism?
A. Fungus
B. Bacterium ✅
C. Protozoan
D. Alga
,2. Question
The cell wall of bacteria is primarily composed of:
A. Cellulose
B. Chitin
C. Peptidoglycan ✅
D. Lignin
3. Question
Which structure is responsible for bacterial motility?
A. Pili
B. Flagella ✅
C. Capsule
D. Ribosome
4. Question
Gram-positive bacteria appear purple after Gram staining due to:
A. Thick peptidoglycan layer ✅
B. Outer membrane
C. Lipopolysaccharides
D. Teichoic acids
,5. Question
Which of the following is NOT a function of the bacterial capsule?
A. Protection from phagocytosis
B. Adherence to surfaces
C. Motility ✅
D. Virulence factor
6. Question
Endospores are produced by:
A. Escherichia coli
B. Bacillus subtilis ✅
C. Staphylococcus aureus
D. Streptococcus pneumoniae
7. Question
The primary stain used in the Gram stain is:
A. Safranin
B. Crystal violet ✅
C. Iodine
D. Alcohol
, 8. Question
Which of the following is a eukaryotic microorganism?
A. Bacteria
B. Archaea
C. Yeast ✅
D. Virus
9. Question
Viruses are classified as:
A. Prokaryotes
B. Eukaryotes
C. Acellular ✅
D. Multicellular
10. Question
The capsid of a virus is made of:
A. Lipids
B. Proteins ✅
C. Carbohydrates
D. Nucleic acids
Study Guide | 2026–2027
Description
This comprehensive set of 200 multiple-choice questions (MCQs) is designed for
revision of BIOD 171 – Microbiology. It covers key topics including microbial
structure, metabolism, genetics, growth, control of microorganisms, immunology,
and applied microbiology. Each question includes four options, with the correct
answer clearly marked ✅, and answers are randomized to avoid patterns.
Keywords
Microbiology, BIOD 171, MCQ, Final Exam, Revision, Bacteria, Viruses, Fungi,
Metabolism, Genetics, Immunology, Microbial Control, Antimicrobials, Sterilization,
Culture Media, Gram Stain, Prokaryotes, Eukaryotes, Pathogens, Host Defense
1. Question
Which of the following is a prokaryotic organism?
A. Fungus
B. Bacterium ✅
C. Protozoan
D. Alga
,2. Question
The cell wall of bacteria is primarily composed of:
A. Cellulose
B. Chitin
C. Peptidoglycan ✅
D. Lignin
3. Question
Which structure is responsible for bacterial motility?
A. Pili
B. Flagella ✅
C. Capsule
D. Ribosome
4. Question
Gram-positive bacteria appear purple after Gram staining due to:
A. Thick peptidoglycan layer ✅
B. Outer membrane
C. Lipopolysaccharides
D. Teichoic acids
,5. Question
Which of the following is NOT a function of the bacterial capsule?
A. Protection from phagocytosis
B. Adherence to surfaces
C. Motility ✅
D. Virulence factor
6. Question
Endospores are produced by:
A. Escherichia coli
B. Bacillus subtilis ✅
C. Staphylococcus aureus
D. Streptococcus pneumoniae
7. Question
The primary stain used in the Gram stain is:
A. Safranin
B. Crystal violet ✅
C. Iodine
D. Alcohol
, 8. Question
Which of the following is a eukaryotic microorganism?
A. Bacteria
B. Archaea
C. Yeast ✅
D. Virus
9. Question
Viruses are classified as:
A. Prokaryotes
B. Eukaryotes
C. Acellular ✅
D. Multicellular
10. Question
The capsid of a virus is made of:
A. Lipids
B. Proteins ✅
C. Carbohydrates
D. Nucleic acids
