MICROBIOLOGY EXAMINATION QUESTIONS AND
CORRECT ANSWER WITH EPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Microbiology is the study of:
A. Microorganisms
B. Rocks and minerals
C. Weather systems
D. Human anatomy only
Answer: A
Rationale: Microbiology focuses on microscopic organisms.
2. Microorganisms include:
A. Bacteria, viruses, fungi, protozoa
B. Rocks and metals
C. Plants only
D. Mammals only
Answer: A
Rationale: These are major microbial groups.
3. The father of microbiology is:
A. Antonie van Leeuwenhoek
B. Charles Darwin
C. Gregor Mendel
D. Robert Boyle
Answer: A
Rationale: He first observed microorganisms.
4. Louis Pasteur is known for:
A. Pasteurization and germ theory
B. Evolution theory
C. Cell discovery
D. Blood circulation
Answer: A
Rationale: Major contributions to microbiology.
5. Robert Koch developed:
A. Koch’s postulates
, B. Cell theory
C. Evolution theory
D. Atomic theory
Answer: A
Rationale: Identified disease-causing microbes.
6. Bacteria are classified as:
A. Prokaryotes
B. Eukaryotes
C. Viruses
D. Protozoa
Answer: A
Rationale: Bacteria lack a true nucleus.
7. Prokaryotic cells lack:
A. Membrane-bound nucleus
B. Cytoplasm
C. Ribosomes
D. Cell membrane
Answer: A
Rationale: Defining feature of prokaryotes.
8. The genetic material of bacteria is found in the:
A. Nucleoid
B. Nucleus
C. Golgi apparatus
D. Mitochondria
Answer: A
Rationale: Bacteria have no true nucleus.
9. Spherical bacteria are called:
A. Cocci
B. Bacilli
C. Spirilla
D. Vibrios
Answer: A
Rationale: Shape classification.
10. Rod-shaped bacteria are called:
A. Bacilli
, B. Cocci
C. Spirilla
D. Spirochetes
Answer: A
Rationale: Rod morphology.
11. Spiral-shaped bacteria are known as:
A. Spirilla
B. Cocci
C. Bacilli
D. Diplococci
Answer: A
Rationale: Spiral morphology classification.
12. The bacterial cell wall contains:
A. Peptidoglycan
B. Cellulose
C. Chitin
D. Keratin
Answer: A
Rationale: Structural bacterial component.
13. Gram-positive bacteria have:
A. Thick peptidoglycan layer
B. Thin peptidoglycan layer
C. No cell wall
D. Chitin wall
Answer: A
Rationale: Retain crystal violet stain.
14. Gram-negative bacteria have:
A. Thin peptidoglycan layer
B. Thick peptidoglycan layer
C. Cellulose wall
D. No membrane
Answer: A
Rationale: Appear pink after Gram stain.
15. The Gram stain was developed by:
A. Hans Christian Gram
CORRECT ANSWER WITH EPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Microbiology is the study of:
A. Microorganisms
B. Rocks and minerals
C. Weather systems
D. Human anatomy only
Answer: A
Rationale: Microbiology focuses on microscopic organisms.
2. Microorganisms include:
A. Bacteria, viruses, fungi, protozoa
B. Rocks and metals
C. Plants only
D. Mammals only
Answer: A
Rationale: These are major microbial groups.
3. The father of microbiology is:
A. Antonie van Leeuwenhoek
B. Charles Darwin
C. Gregor Mendel
D. Robert Boyle
Answer: A
Rationale: He first observed microorganisms.
4. Louis Pasteur is known for:
A. Pasteurization and germ theory
B. Evolution theory
C. Cell discovery
D. Blood circulation
Answer: A
Rationale: Major contributions to microbiology.
5. Robert Koch developed:
A. Koch’s postulates
, B. Cell theory
C. Evolution theory
D. Atomic theory
Answer: A
Rationale: Identified disease-causing microbes.
6. Bacteria are classified as:
A. Prokaryotes
B. Eukaryotes
C. Viruses
D. Protozoa
Answer: A
Rationale: Bacteria lack a true nucleus.
7. Prokaryotic cells lack:
A. Membrane-bound nucleus
B. Cytoplasm
C. Ribosomes
D. Cell membrane
Answer: A
Rationale: Defining feature of prokaryotes.
8. The genetic material of bacteria is found in the:
A. Nucleoid
B. Nucleus
C. Golgi apparatus
D. Mitochondria
Answer: A
Rationale: Bacteria have no true nucleus.
9. Spherical bacteria are called:
A. Cocci
B. Bacilli
C. Spirilla
D. Vibrios
Answer: A
Rationale: Shape classification.
10. Rod-shaped bacteria are called:
A. Bacilli
, B. Cocci
C. Spirilla
D. Spirochetes
Answer: A
Rationale: Rod morphology.
11. Spiral-shaped bacteria are known as:
A. Spirilla
B. Cocci
C. Bacilli
D. Diplococci
Answer: A
Rationale: Spiral morphology classification.
12. The bacterial cell wall contains:
A. Peptidoglycan
B. Cellulose
C. Chitin
D. Keratin
Answer: A
Rationale: Structural bacterial component.
13. Gram-positive bacteria have:
A. Thick peptidoglycan layer
B. Thin peptidoglycan layer
C. No cell wall
D. Chitin wall
Answer: A
Rationale: Retain crystal violet stain.
14. Gram-negative bacteria have:
A. Thin peptidoglycan layer
B. Thick peptidoglycan layer
C. Cellulose wall
D. No membrane
Answer: A
Rationale: Appear pink after Gram stain.
15. The Gram stain was developed by:
A. Hans Christian Gram
