MCB 2000 Microbiology & Infection Control
Theory Final Exam Latest 2026 – 150
Questions with Correct Answers & Detailed
Rationales | Stuvia Study Guide PDF
Section 1: Introduction to Microbiology & Historical Foundations (Questions 1–10)
1. Which scientist is most responsible for ending the controversy about spontaneous
generation?
A. Robert Koch
B. John Needham
C. Joseph Lister
D. Louis Pasteur
Correct Answer: D
Rationale: Louis Pasteur is credited with ending the spontaneous generation controversy
through his swan-neck flask experiments, demonstrating that microorganisms come from
pre-existing microorganisms, not from non-living matter .
2. Who first observed and described microorganisms in the mid-1600s and coined the
term "cell"?
,A. Anton van Leeuwenhoek
B. Robert Hooke
C. Louis Pasteur
D. Robert Koch
Correct Answer: B
Rationale: Robert Hooke was the first to observe and describe microorganisms in the mid-
1600s and coined the term "cell." Anton van Leeuwenhoek later observed bacteria and
protozoa .
3. Which of the following is NOT a major group of microbiological organisms?
A. Bacteria
B. Viruses
C. Helminths
D. Prions
Correct Answer: D
Rationale: Prions are infectious proteins, not microorganisms. The major groups of
microbiological organisms include bacteria, viruses, fungi, protozoa, and helminths .
4. Which scientist developed a set of postulates to establish the causative
relationship between a microbe and a disease?
A. Louis Pasteur
B. Robert Koch
C. Joseph Lister
D. Alexander Fleming
,Correct Answer: B
Rationale: Robert Koch developed a set of postulates (Koch's postulates) to establish the
causative relationship between a specific microbe and a disease. These postulates remain
fundamental in medical microbiology .
5. What is the primary focus of the MCB 2000 course?
A. Environmental microbiology only
B. Basics of microbiology for health professionals
C. Industrial microbiology only
D. Food microbiology only
Correct Answer: B
Rationale: The MCB 2000 course description states that it covers the basics of microbiology
for health professionals, focusing on disease states and the role of bacteria, viruses, fungi,
rickettsiae, and other pathogenic organisms .
6. Which of the following is NOT one of the major topics covered in MCB 2000?
A. Microbial metabolism
B. Microbial genetics
C. Astronomy
D. Principles of disease and epidemiology
Correct Answer: C
Rationale: Astronomy is not a topic covered in MCB 2000. Major topics include microbial
metabolism, microbial genetics, principles of disease and epidemiology, and many others
related to microbiology and infection control .
7. Which individual is credited with the discovery of penicillin?
, A. Louis Pasteur
B. Robert Koch
C. Alexander Fleming
D. Joseph Lister
Correct Answer: C
Rationale: Alexander Fleming discovered penicillin in 1928 when he observed that a mould
(Penicillium) inhibited the growth of bacteria. This discovery revolutionised the treatment of
bacterial infections .
8. What is the significance of the microscope in microbiology?
A. It allows visualisation of microorganisms too small to be seen with the naked eye
B. It is used to sterilise equipment
C. It is used to culture bacteria
D. It is used to test antibiotic sensitivity
Correct Answer: A
Rationale: The microscope is significant in microbiology because it allows visualisation of
microorganisms that are too small to be seen with the naked eye. The invention of the
microscope was a pivotal event in the field of microbiology .
9. Which of the following is a beneficial application of microorganisms?
A. Production of antibiotics
B. Food fermentation
C. Bioremediation
D. All of the above
Theory Final Exam Latest 2026 – 150
Questions with Correct Answers & Detailed
Rationales | Stuvia Study Guide PDF
Section 1: Introduction to Microbiology & Historical Foundations (Questions 1–10)
1. Which scientist is most responsible for ending the controversy about spontaneous
generation?
A. Robert Koch
B. John Needham
C. Joseph Lister
D. Louis Pasteur
Correct Answer: D
Rationale: Louis Pasteur is credited with ending the spontaneous generation controversy
through his swan-neck flask experiments, demonstrating that microorganisms come from
pre-existing microorganisms, not from non-living matter .
2. Who first observed and described microorganisms in the mid-1600s and coined the
term "cell"?
,A. Anton van Leeuwenhoek
B. Robert Hooke
C. Louis Pasteur
D. Robert Koch
Correct Answer: B
Rationale: Robert Hooke was the first to observe and describe microorganisms in the mid-
1600s and coined the term "cell." Anton van Leeuwenhoek later observed bacteria and
protozoa .
3. Which of the following is NOT a major group of microbiological organisms?
A. Bacteria
B. Viruses
C. Helminths
D. Prions
Correct Answer: D
Rationale: Prions are infectious proteins, not microorganisms. The major groups of
microbiological organisms include bacteria, viruses, fungi, protozoa, and helminths .
4. Which scientist developed a set of postulates to establish the causative
relationship between a microbe and a disease?
A. Louis Pasteur
B. Robert Koch
C. Joseph Lister
D. Alexander Fleming
,Correct Answer: B
Rationale: Robert Koch developed a set of postulates (Koch's postulates) to establish the
causative relationship between a specific microbe and a disease. These postulates remain
fundamental in medical microbiology .
5. What is the primary focus of the MCB 2000 course?
A. Environmental microbiology only
B. Basics of microbiology for health professionals
C. Industrial microbiology only
D. Food microbiology only
Correct Answer: B
Rationale: The MCB 2000 course description states that it covers the basics of microbiology
for health professionals, focusing on disease states and the role of bacteria, viruses, fungi,
rickettsiae, and other pathogenic organisms .
6. Which of the following is NOT one of the major topics covered in MCB 2000?
A. Microbial metabolism
B. Microbial genetics
C. Astronomy
D. Principles of disease and epidemiology
Correct Answer: C
Rationale: Astronomy is not a topic covered in MCB 2000. Major topics include microbial
metabolism, microbial genetics, principles of disease and epidemiology, and many others
related to microbiology and infection control .
7. Which individual is credited with the discovery of penicillin?
, A. Louis Pasteur
B. Robert Koch
C. Alexander Fleming
D. Joseph Lister
Correct Answer: C
Rationale: Alexander Fleming discovered penicillin in 1928 when he observed that a mould
(Penicillium) inhibited the growth of bacteria. This discovery revolutionised the treatment of
bacterial infections .
8. What is the significance of the microscope in microbiology?
A. It allows visualisation of microorganisms too small to be seen with the naked eye
B. It is used to sterilise equipment
C. It is used to culture bacteria
D. It is used to test antibiotic sensitivity
Correct Answer: A
Rationale: The microscope is significant in microbiology because it allows visualisation of
microorganisms that are too small to be seen with the naked eye. The invention of the
microscope was a pivotal event in the field of microbiology .
9. Which of the following is a beneficial application of microorganisms?
A. Production of antibiotics
B. Food fermentation
C. Bioremediation
D. All of the above
