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Objective Questions

Latest NEET PG Microbiology Exam Question (Objective Questions), MCQ in English

Subjects : Microbiology

Question Bank NEET PG Microbiology Exam - English
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Microbiology

Question 1Single Answer
Who is known as the father of microbiology for his work on biogenesis?
  1. A
    Robert Koch
  2. B
    Alexander Fleming
  3. C
    Joseph Lister
  4. D
    Louis Pasteur
Question 2Single Answer
Which scientist developed postulates to identify the causative agent of a disease?
  1. A
    Louis Pasteur
  2. B
    Joseph Lister
  3. C
    Robert Koch
  4. D
    Alexander Fleming
Question 3Single Answer
Who discovered the antibiotic penicillin?
  1. A
    Robert Koch
  2. B
    Louis Pasteur
  3. C
    Alexander Fleming
  4. D
    Joseph Lister
Question 4Single Answer
Which scientist introduced antiseptic surgery using carbolic acid?
  1. A
    Louis Pasteur
  2. B
    Joseph Lister
  3. C
    Robert Koch
  4. D
    Alexander Fleming
Question 5Single Answer
What was Louis Pasteur’s key contribution to microbiology?
  1. A
    Development of Koch’s postulates
  2. B
    Disproving spontaneous generation
  3. C
    Discovery of penicillin
  4. D
    Introduction of antiseptic surgery
Question 6Single Answer
Which disease was Robert Koch associated with identifying the causative agent for?
  1. A
    Tuberculosis
  2. B
    Smallpox
  3. C
    Polio
  4. D
    Rabies
Question 7Single Answer
Who developed the rabies vaccine?
  1. A
    Robert Koch
  2. B
    Louis Pasteur
  3. C
    Joseph Lister
  4. D
    Alexander Fleming
Question 8Single Answer
Which scientist demonstrated that microorganisms cause fermentation?
  1. A
    Joseph Lister
  2. B
    Robert Koch
  3. C
    Louis Pasteur
  4. D
    Alexander Fleming
Question 9Single Answer
What was Alexander Fleming’s contribution to microbiology?
  1. A
    Development of the smallpox vaccine
  2. B
    Discovery of penicillin
  3. C
    Introduction of sterilization techniques
  4. D
    Identification of anthrax bacillus
Question 10Single Answer
Which scientist used agar as a solid medium for bacterial culture?
  1. A
    Robert Koch
  2. B
    Louis Pasteur
  3. C
    Joseph Lister
  4. D
    Alexander Fleming
Question 11Single Answer
What was Joseph Lister’s major contribution to medicine?
  1. A
    Development of vaccines
  2. B
    Identification of bacterial spores
  3. C
    Discovery of antibiotics
  4. D
    Use of antiseptics in surgery
Question 12Single Answer
Which discovery by Louis Pasteur contributed to food preservation?
  1. A
    Autoclaving
  2. B
    Pasteurization
  3. C
    Filtration
  4. D
    Incineration
Question 13Single Answer
Who identified the causative agent of anthrax?
  1. A
    Louis Pasteur
  2. B
    Joseph Lister
  3. C
    Robert Koch
  4. D
    Alexander Fleming
Question 14Single Answer
Which scientist’s work led to the development of attenuated vaccines?
  1. A
    Robert Koch
  2. B
    Alexander Fleming
  3. C
    Joseph Lister
  4. D
    Louis Pasteur
Question 15Single Answer
What was a key contribution of Robert Koch to bacteriology?
  1. A
    Disproving spontaneous generation
  2. B
    Developing antiseptic surgery
  3. C
    Establishing pure culture techniques
  4. D
    Discovering penicillin
Question 16Single Answer
Which scientist’s work reduced post-surgical infections?
  1. A
    Louis Pasteur
  2. B
    Robert Koch
  3. C
    Alexander Fleming
  4. D
    Joseph Lister
Question 17Single Answer
Who developed the swan-neck flask experiment?
  1. A
    Robert Koch
  2. B
    Alexander Fleming
  3. C
    Joseph Lister
  4. D
    Louis Pasteur
Question 18Single Answer
Which scientist isolated Mycobacterium tuberculosis?
  1. A
    Louis Pasteur
  2. B
    Joseph Lister
  3. C
    Robert Koch
  4. D
    Alexander Fleming
Question 19Single Answer
What was Alexander Fleming’s observation that led to penicillin discovery?
  1. A
    Bacterial growth on agar
  2. B
    Spontaneous generation
  3. C
    Fermentation of sugars
  4. D
    Inhibition of bacterial growth by mold
Question 20Single Answer
Which scientist’s work laid the foundation for modern bacteriology?
  1. A
    Louis Pasteur
  2. B
    Joseph Lister
  3. C
    Robert Koch
  4. D
    Alexander Fleming
Question 21Single Answer
What is the primary source of illumination in a light microscope?
  1. A
    Ultraviolet light
  2. B
    Electron beam
  3. C
    Visible light
  4. D
    X-rays
Question 22Single Answer
Which microscope is used to visualize unstained living cells?
  1. A
    Light microscope
  2. B
    Phase contrast microscope
  3. C
    Electron microscope
  4. D
    Fluorescence microscope
Question 23Single Answer
What is the maximum resolution of a light microscope?
  1. A
    0.2 nm
  2. B
    2 nm
  3. C
    2 µm
  4. D
    200 nm
Question 24Single Answer
Which microscope uses UV light and fluorescent dyes?
  1. A
    Fluorescence microscope
  2. B
    Phase contrast microscope
  3. C
    Darkfield microscope
  4. D
    Electron microscope
Question 25Single Answer
What is a key application of the electron microscope?
  1. A
    Observing live cells
  2. B
    Detecting fluorescent dyes
  3. C
    Visualizing ultrastructural details of cells
  4. D
    Viewing unstained specimens
Question 26Single Answer
Which microscope is used to observe spirochetes in a wet mount?
  1. A
    Light microscope
  2. B
    Electron microscope
  3. C
    Phase contrast microscope
  4. D
    Darkfield microscope
Question 27Single Answer
What is the principle of a phase contrast microscope?
  1. A
    Differential absorption of UV light
  2. B
    Emission of fluorescent light
  3. C
    Electron scattering by specimens
  4. D
    Phase shifts in light passing through specimens
Question 28Single Answer
Which microscope provides the highest magnification?
  1. A
    Electron microscope
  2. B
    Phase contrast microscope
  3. C
    Fluorescence microscope
  4. D
    Light microscope
Question 29Single Answer
What is a limitation of the electron microscope?
  1. A
    Low resolution
  2. B
    Low magnification
  3. C
    Use of visible light
  4. D
    Inability to observe live specimens
Question 30Single Answer
Which microscope is best for observing bacterial motility?
  1. A
    Electron microscope
  2. B
    Light microscope
  3. C
    Fluorescence microscope
  4. D
    Darkfield microscope
Question 31Single Answer
What is the principle of a fluorescence microscope?
  1. A
    Emission of light by excited fluorochromes
  2. B
    Scattering of electrons
  3. C
    Phase shifts in light
  4. D
    Heat-based illumination
Question 32Single Answer
Which microscope is used to study viral particles?
  1. A
    Electron microscope
  2. B
    Phase contrast microscope
  3. C
    Light microscope
  4. D
    Darkfield microscope
Question 33Single Answer
What is a key application of the darkfield microscope?
  1. A
    Visualizing stained bacteria
  2. B
    Observing unstained live specimens
  3. C
    Detecting fluorescent dyes
  4. D
    Viewing ultrastructural details
Question 34Single Answer
Which microscope uses a condenser to scatter light?
  1. A
    Darkfield microscope
  2. B
    Light microscope
  3. C
    Phase contrast microscope
  4. D
    Electron microscope
Question 35Single Answer
What is the resolution limit of an electron microscope?
  1. A
    2 nm
  2. B
    0.2 nm
  3. C
    200 nm
  4. D
    2 µm
Question 36Single Answer
Which microscope is used to detect Mycobacterium tuberculosis with auramine stain?
  1. A
    Light microscope
  2. B
    Phase contrast microscope
  3. C
    Fluorescence microscope
  4. D
    Electron microscope
Question 37Single Answer
What is a key feature of a scanning electron microscope (SEM)?
  1. A
    Visualizes internal cell structures
  2. B
    Observes live specimens
  3. C
    Uses visible light
  4. D
    Provides 3D surface images
Question 38Single Answer
Which microscope is best for studying bacterial cell surface structures?
  1. A
    Light microscope
  2. B
    Scanning electron microscope
  3. C
    Phase contrast microscope
  4. D
    Fluorescence microscope
Question 39Single Answer
What is a limitation of the light microscope?
  1. A
    Inability to observe live cells
  2. B
    High cost of operation
  3. C
    Limited resolution for small structures
  4. D
    Inability to use stains
Question 40Single Answer
Which microscope is used to observe the internal structure of organelles?
  1. A
    Transmission electron microscope
  2. B
    Darkfield microscope
  3. C
    Light microscope
  4. D
    Phase contrast microscope
Question 41Single Answer
What is the process of destroying all forms of microbial life, including spores?
  1. A
    Disinfection
  2. B
    Pasteurization
  3. C
    Sanitization
  4. D
    Sterilization
Question 42Single Answer
What is the definition of disinfection?
  1. A
    Reducing microbial load on inanimate objects
  2. B
    Destroying all microbial life
  3. C
    Cleaning surfaces without chemicals
  4. D
    Killing only bacterial spores
Question 43Single Answer
What is an antiseptic?
  1. A
    A chemical used on living tissues to reduce microbes
  2. B
    A chemical used on inanimate objects
  3. C
    A method of sterilization
  4. D
    A process of pasteurization
Question 44Single Answer
What is sanitization?
  1. A
    Destroying all microbial life
  2. B
    Killing only viruses
  3. C
    Reducing microbial load to safe levels
  4. D
    Sterilizing medical equipment
Question 45Single Answer
What is pasteurization?
  1. A
    Complete sterilization of liquids
  2. B
    Destruction of bacterial spores
  3. C
    Chemical disinfection of surfaces
  4. D
    Heat treatment to reduce pathogenic microbes in food
Question 46Single Answer
Which process is used to eliminate bacterial spores?
  1. A
    Disinfection
  2. B
    Sanitization
  3. C
    Sterilization
  4. D
    Pasteurization
Question 47Single Answer
What is the key difference between sterilization and disinfection?
  1. A
    Sterilization kills only viruses
  2. B
    Sterilization destroys all microbes, including spores
  3. C
    Disinfection destroys all microbes
  4. D
    Disinfection is used on living tissues
Question 48Single Answer
Which process is used to reduce microbes on skin before surgery?
  1. A
    Sterilization
  2. B
    Disinfection
  3. C
    Antisepsis
  4. D
    Pasteurization
Question 49Single Answer
What is the goal of sanitization in food preparation?
  1. A
    Destroy all microbes
  2. B
    Reduce microbes to safe levels
  3. C
    Kill only bacterial spores
  4. D
    Sterilize equipment
Question 50Single Answer
Which process uses heat to reduce pathogens in milk?
  1. A
    Sterilization
  2. B
    Disinfection
  3. C
    Pasteurization
  4. D
    Antisepsis
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