50+ TOP Interview Questions and Answers on Bacteria [UPDATED]

If you’re preparing for job interview and whether you’re experienced or fresher & don’t know what kind of questions will be asked on Bacteria, then go through the below Real Time 50+ Top Bacteria Interview Questions and Answers to crack your job interview.

Bacteria Interview Questions and Answers

  • Question: Bacteria Which Can Grow Only In The Presence Of Oxygen Are Called?

    Answer :

    Obligate aerobes.

  • Question: Bacteria Which Can Grow With Or Without Oxygen?

    Answer :

    Facultative anaerobes.

  • Question: How Are Bacteria Classified ?

    Answer :

    They are classified into the following types of cell, the ovoid or spheroid called coccus, the rod or cylindrical bacillus, the curved vibrio and coil shaped spirochaete.

  • Question: How Bacteria Helps Human Body ?

    Answer :

    Certain bacteria helps us digest or food. Bacteria in our digestive system help to convert milk protein into latic acid and inhabit the growth of potentially harmful bacteria.

  • Question: How Bacteria Is Useful To Man ?

    Answer :

    Bacteria is useful to man in major fields viz, agriculture, industry, medicine and biological research.

  • Question: How Bio – Films Are Important In Medicine ?

    Answer :

    As these structures are often present during chronic bacterial infections or in infections of implanted medical devices, the bacteria protected within the bio – films are much harder to kill than isolated bacteria.

  • Question: Name The Bacterium Which Causes Gonorrhea ?

    Answer :

    Nisseria Gonnorrhea.

  • Question: Name The Leprosy Producing Bacteria?

    Answer :

    Mycrobacterium leprae.

  • Question: Organic Materials Decay Due To The Action Of Which Agency ?

    Answer :

    Bacteria .

  • Question: The Substance Excreted By Bacteria Into Human Body?

    Answer :

    Toxin

  • Question: What Are Bacteriophagees ?

    Answer :

    They are viruses that changethe bacterial DNA. 

  • Question: What Are Probiotics ?

    Answer :

    They are live micro organisms that are similar to beneficial micro organisms found in human gut. They are also called “ Friendly bacteria ” of “ Good bacteria ”.

  • Question: What Bacteria Causes Ulcer In Human Being ?

    Answer :

    Helicobacter pylon.

  • Question: What Causes Bad Breadth ( Halitosis ) ?

    Answer :

    Bad breath is usually due to the break down of proteins by baterica in the mouth.

  • Question: What Is A ‘ Green Sulphur ’ Bacteria ?

    Answer :

    These are a family of anaerobic photo autographic bacteria which are non – mobile and came to spheres, rods and spirals.

  • Question: What Is Bacteria ?

    Answer :

    They are microscopic unicelluar prokaryotic organisms distributed in various habits. Most of them lack chlorophyll and hence lead a heterotrophic mode of life.

  • Question: What Is Bacterial Conjugation ?

    Answer :

    It is the transfer of genetic material between bacteria through direct cell – to – cell contact. This conjugation was discovered in 1946 by Jousua Lederberg and Edwin Tatum.

  • Question: What Is Bio – Films Or Bacterial Mats ?

    Answer :

    Bacteria often attach to surfaces and form dense aggregation which is called bio – films or bacterial mats.

  • Question: What Is Flagella ?

    Answer :

    It is a tail – like structure that projects from the cell body of bacteria, which helps the functions in locomotion.

  • Question: What Is Size Of The Bacteria ?

    Answer :

    104cm.

  • Question: What Is The Hair Like Structure Of The Bacteria Is Called ?

    Answer :

    Flagella 

  • Question: What Knid Of Bacterium Spreads Cholera ?

    Answer :

    Vibrio

  • Question: What Produces Gas In Our Intestines ?

    Answer :

    The are live micro organisms that are similar to beneficial micro organisms found in human gut. They are also called “ friendly bacteria ” of “ good bacteria ”.

  • Question: Where Is The Respiratory Enzymes In Bacteria Are Chiefly Located ?

    Answer :

    In plasma membrane.

  • Question: Which Are Autotrophic Bacteria ?

    Answer :

    The bacteria which are capable of synthesining their organic food from simple organic substances.

  • Question: Which Are Four Types Of Bacteria ?

    Answer :

    Coccus, bacillus, vibrio and sprial.

  • Question: Which Are Heterotrophic Bacteria ?

    Answer :

    Tire bacteria which are unable to synthesise their organic food from simple organic substances . 

  • Question: Which Are The Antibiotics Obtained From Bacteria ?

    Answer :

    Streptomycin, chloromycetin, neomycin, terramycin etc..

  • Question: Which Are The Four Types Of Bacteria According To The Cells ?

    Answer :

    1.  Monotrichous
    2.  Lopotrichous
    3.  Amphitichous
    4.  Deritrichous .
    5. All these have flagella
    6. Question: Which Are The Harmful Activities Caused By Bacteria ?

      Answer :

      Spoilage of food and cotton materials, diseases and denitrification.

    7. Question: Which Bacterium Causes Tetanus ?

      Answer :

      Clostridium tetani.

    8. Question: Which Bacterium Is Responsible To Make Milk Into Curd ?

      Answer :

      The lactobacillus.

    9. Question: Which Bacterium Produces Syphilis ?

      Answer :

      Triponema Pallidum

    10. Question: Which Bacterium Spreads Typhoid ?

      Answer :

      Salmonella typhosa.

    11. Question: Which Is The Bacteria That Have No Flagella ?

      Answer :

      Atrichous.

    12. Question: Which Is The Bacterium In The Soil That Can Absorb Nitrogen ?

      Answer :

      Azotobactor 

    13. Question: Which Scientist Established That Bacteria Are Plants ?

      Answer :

      karl Wilhem Von Nigole in 1857.

    14. Question: Who Discovered Bacteria ?

      Answer :

      Anton Van Leeuwenhock in 1676

    15. Question: Who Established That There Are Bacteria Which Are Beneficial To Man ?

      Answer :

      Louis Pasteur

    16. Question: Who Isolated The Bacterium Which Causes Leprosy ?

      Answer :

      G.R. Hanson. 

    17. Question: Why Is Bacteria Cannot Survive In A Highly Salted Pickle ?

      Answer :

      Because they become plasmolysed and consequently get killed.