Bacteria Interview Questions & Answers

Question 1. Who Discovered Bacteria ?

Answer :

Anton Van Leeuwenhock in 1676

Question 2. Which Are Four Types Of Bacteria ?

Answer :

Coccus, bacillus, vibrio and sprial.

Question 3. What Is The Hair Like Structure Of The Bacteria Is Called ?

Answer :

Flagella 

Question 4. Which Is The Bacteria That Have No Flagella ?

Answer :

Atrichous.

Question 5. Where Is The Respiratory Enzymes In Bacteria Are Chiefly Located ?

Answer :

In plasma membrane.

Question 6. Bacteria Which Can Grow Only In The Presence Of Oxygen Are Called?

Answer :

Obligate aerobes.

Question 7. Bacteria Which Can Grow With Or Without Oxygen?

Answer :

Facultative anaerobes.

Question 8. Organic Materials Decay Due To The Action Of Which Agency ?

Answer :

Bacteria .

Question 9. Which Scientist Established That Bacteria Are Plants ?

Answer :

karl Wilhem Von Nigole in 1857.

Question 10. What Is Size Of The Bacteria ?

Answer :

10⁴cm.

Question 11. 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 12. 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

Question 13. Which Are Heterotrophic Bacteria ?

Answer :

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

Question 14. Which Are Autotrophic Bacteria ?

Answer :

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

Question 15. How Bacteria Is Useful To Man ?

Answer :

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

Question 16. Which Are The Antibiotics Obtained From Bacteria ?

Answer :

Streptomycin, chloromycetin, neomycin, terramycin etc..

Question 17. Which Are The Harmful Activities Caused By Bacteria ?

Answer :

Spoilage of food and cotton materials, diseases and denitrification.

Question 18. Which Is The Bacterium In The Soil That Can Absorb Nitrogen ?

Answer :

Azotobactor 

Question 19. Who Established That There Are Bacteria Which Are Beneficial To Man ?

Answer :

Louis Pasteur

Question 20. Which Bacterium Causes Tetanus ?

Answer :

Clostridium tetani.

Question 21. 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 22. Why Is Bacteria Cannot Survive In A Highly Salted Pickle ?

Answer :

Because they become plasmolysed and consequently get killed.

Question 23. Which Bacterium Is Responsible To Make Milk Into Curd ?

Answer :

The lactobacillus.

Question 24. Which Bacterium Spreads Typhoid ?

Answer :

Salmonella typhosa.

Question 25. What Knid Of Bacterium Spreads Cholera ?

Answer :

Vibrio

Question 26. Name The Bacterium Which Causes Gonorrhea ?

Answer :

Nisseria Gonnorrhea.

Question 27. Which Bacterium Produces Syphilis ?

Answer :

Triponema Pallidum

Question 28. Who Isolated The Bacterium Which Causes Leprosy ?

Answer :

G.R. Hanson. 

Question 29. Name The Leprosy Producing Bacteria?

Answer :

Mycrobacterium leprae.

Question 30. The Substance Excreted By Bacteria Into Human Body?

Answer :

Toxin

Question 31. 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 32. 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 33. 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 34. 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 35. What Bacteria Causes Ulcer In Human Being ?

Answer :

Helicobacter pylon.

Question 36. 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 37. What Causes Bad Breadth ( Halitosis ) ?

Answer :

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

Question 38. What Are Bacteriophagees ?

Answer :

They are viruses that changethe bacterial DNA. 

Question 39. 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 40. 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 41. 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 ”.