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Mcqs

Microbiology Mcqs

Our 1000+ MCQs focus on all topics of the Microbiology subject, covering 100+ topics. This will help you to prepare for exams, contests, online tests, quizzes, viva-voce, interviews, and certifications. You can practice these MCQs chapter by chapter starting from the 1st chapter or you can jump to any chapter of your choice.

  • The Characterization, Classification and Identification of Microorganisms
  • The Microscopic Examination of Microorganisms
  • The Morphology and Fine Structure of Bacteria
  • The Cultivation of Bacteria
  • Reproduction and Growth
  • Pure Cultures and Cultural Characteristics
  • Microbial Metabolism: Energy Production
  • Microbial Metabolism: Utilization of Energy and Biosynthesis
  • The World of Bacteria I & II
  • Fungi – Molds and Yeasts
  • Algae & Protozoa
  • Viruses of Bacteria
  • Viruses of Animals and Plants
  • The Control of Microorganisms by Physical & Chemical Agents
  • Antibiotics and Other Chemotherapeutic Agents
  • Microbiology of Soil & Aquatic Microbiology
  • Microbiology of Domestic Water and Wastewater, Microbiology of Food
  • Industrial Microbiology & Bacterial Genetics
  • Microbial Flora of the Healthy Human Host, Host-Microbe Interactions : The Process of Infection
  • Microbial Agents of Disease: Bacteria & Viruses
  • Microbial Agents of Disease: Fungi and Protozoa

 

Latest Popular
Q:

Which of the following is used in electron microscope?

A) electron beams and magnetic fields B) light waves
C) magnetic fields D) electron beams
 
Answer & Explanation Answer: A) electron beams and magnetic fields

Explanation: Electron Microscope uses electron beams and magnetic fields to produce the image, whereas the light microscope uses light waves and glass lenses. In electron microscopy, a much higher resolution is obtained with extremely short wavelength of the electron beam.

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Category: Biotech Engineering MCQs
Sub Category: Microbiology Mcqs

76
Q:

The greatest resolution in light microscopy can be obtained with ___________

A) Shortest wavelength of visible light used B) Longest wavelength of visible light used
C) An objective with minimum numerical aperture D) Shortest wavelength of visible light used and an objective with the maximum numerical aperture
 
Answer & Explanation Answer: D) Shortest wavelength of visible light used and an objective with the maximum numerical aperture

Explanation: The relationship between numerical aperture (NA) and resolution is:-
Resolution (d) = wavelength / 2(NA)
Thus maximum resolution is obtained with the shortest wavelength of visible light and an objective with the maximum NA.

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Category: Biotech Engineering MCQs
Sub Category: Microbiology Mcqs

134
Q:

What is the approximate size of the bacterial cell?

A) 1mm in diameter B) 0.5 to 1.0 micrometer in diameter
C) 2mm in diameter D) 2 micrometer in diameter
 
Answer & Explanation Answer: B) 0.5 to 1.0 micrometer in diameter

Explanation: Bacteria are very small, most being approximately 0.5 to 1.0 micrometer in diameter. This is the reason why they cannot be seen by naked eyes and can be observed under the microscope.

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Category: Biotech Engineering MCQs
Sub Category: Microbiology Mcqs

108
Q:

Which of the following are produced by microorganisms?

A) Alcoholic beverages B) Fermented dairy products
C) Breads D) All of the mentioned
 
Answer & Explanation Answer: D) All of the mentioned

Explanation: Microorganisms are used in many industries for the production of food we eat, like fermented dairy products (sour cream, yogurt), as well as fermented foods as pickles, breads and alcoholic beverages.

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Category: Biotech Engineering MCQs
Sub Category: Microbiology Mcqs

92
Q:

Which part of the compound microscope helps in gathering and focusing light rays on the specimen to be viewed?

A) Condenser lens B) Magnifying lens
C) Objective lens D) Eyepiece lens
 
Answer & Explanation Answer: A) Condenser lens

Explanation: Compound microscope contains three separate lens systems. The condenser lens is placed between the light source and the specimen and it gathers and focuses the light rays in the plane of the microscopic field to view the specimen.

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Category: Biotech Engineering MCQs
Sub Category: Microbiology Mcqs

130
Q:

Which microorganism(s) among the following perform photosynthesis by utilizing light?

A) Cyanobacteria, Fungi and Viruses B) Viruses
C) Cyanobacteria D) Fungi
 
Answer & Explanation Answer: C) Cyanobacteria

Explanation: Cyanobacteria require light as a source of energy to perform photosynthesis. Fungi and viruses are unable to perform photosynthesis and are heterotrophic.

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Category: Biotech Engineering MCQs
Sub Category: Microbiology Mcqs

119
Q:

Who is known as the father of Microbiology?

A) Edwin John Butler B) Ferdinand Cohn
C) Robert Koch D) Antoni van Leeuwenhoek
 
Answer & Explanation Answer: D) Antoni van Leeuwenhoek

Explanation: Antoni van Leeuwenhoek, a Delft cloth merchant, is considered the father of microbiology. He discovered the invisible world of microorganisms using homemade microscopes.

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Category: Biotech Engineering MCQs
Sub Category: Microbiology Mcqs

112
Q:

What is Microbiology?

A) Study of molecules that are visible to human eyes B) Study of animals and their family
C) Study of organisms that are not visible to naked eyes D) Study of microscope
 
Answer & Explanation Answer: C) Study of organisms that are not visible to naked eyes

Explanation: Study of organisms that are not visible to naked eyes is known as Microbiology. A special device known as a microscope is required to view these organisms. Example: Bacteria, viruses, fungi, etc.

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Category: Biotech Engineering MCQs
Sub Category: Microbiology Mcqs

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