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NEET Microbes in Human Welfare PYQs with Solutions

391 previous year questions from Microbes in Human Welfare (NEET UG Zoology) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

391 questionsZoology2002–2026Answers + solutions

About Microbes in Human Welfare PYQs

Microbes in Human Welfare has 391 previous year questions in the Quantrex Academy NEET UG Zoology bank. The 220 questions in this list come from NEET (207) and JIPMER (13), spanning 2002 to 2026. Each question opens on its own page with the options, the correct answer and the worked solution where available.

Questions by year (this list)

  • 2026: 3
  • 2025: 4
  • 2024: 4
  • 2022: 1
  • 2021: 1
  • 2020: 5
  • 2019: 7
  • 2018: 1
  • 2017: 3
  • 2016: 6
  • 2015: 3
  • 2014: 3

Microbes in Human Welfare questions with solutions

1

What is the reason behind production of large holes in 'Swiss Cheese' ?

NEET 2026 Solution View → 2

Match List I with List II : List I (Bioactive molecules) List II (Importance) A. Streptokinase I. Immunosuppressive agent B. Statins II. Removal of clots from the blood vessels C.

NEET 2026 Solution View → 3

Which of the following is used as a clot buster ?

NEET 2026 Solution View → 4

Which of the following is an example of non-distilled alcoholic beverage produced by yeast?

NEET 2025 Solution View → 5

Which of following organisms cannot fix nitrogen? A. Azotobacter B. Oscillatoria C. Anabaena D. Volvox E. Nostoc Choose the correct answer from the options given below:

NEET 2025 Solution View → 6

Which of the following microbes is NOT involved in the preparation of household products? A. Aspergillus niger B. Lactobacillus C. Trichoderma polysporum D. Saccharomyces

NEET 2025 Solution View → 7

Streptokinase produced by bacterium Streptococcus is used for

NEET 2025 Solution View → 8

Match List-I with List-II relating to microbes and their products: List-I (Microbes) List-II (Products) A. Streptococcus I. Citric acid B. Trichoderma polysporum II. Clot buster

NEET 2024 Solution View → 9

Given below are two statements: Statement I: Antibiotics are chemicals produced by microbes that kill other microbes. Statement II: Antibodies are chemicals formed in body that

NEET 2024 Solution View → 10

Match List I with List II Choose the correct answer from the options given below:

NEET 2024 Solution View → 11

Following are the steps involved in action of toxin in Bt. Cotton A. The inactive toxin converted into active form due to alkaline pH of gut of insect. B. Bacillus thuringiensis

NEET 2024 Solution View → 12

Identify the microorganism which is responsible for the production of an immunosuppressive molecule cyclosporin A:

NEET 2022 Solution View → 13

Match List - I with List - II . List - I List - II (a) Aspergillus niger (i) Acetic acid (b) Acetobacter aceti (ii) Lactic acid (c) Clostridium butylicum (iii) Citric acid (d)

NEET 2021 Solution View → 14

For the commercial and industrial production of citric acid, which of the following microbes is used?

NEET 2020 Solution View → 15

Match the following columns and select the correct option: Column - I column - II (a) Dragonflies (i) Biocontrol agents of several plant pathogens (b) Bacillus thuringiensis (ii)

NEET 2020 Solution View → 16

Cyclosporin A , used as an immuno-suppression agent, is produced from:

NEET 2020 Solution View → 17

Match the following columns and select the correct option. Column-I Column-II (a) Clostridium butylicum (i) Cyclosporin-A (b) Trichoderma polysporum (ii) Butyric Acid (c) Monascus

NEET 2020 Solution View → 18

Which of the following is put into Anaerobic sludge digester for further sewage treatment?

NEET 2020 Solution View → 19

Among the following pairs of microbes, which pair has both the microbes that can be used as biofertilisers?

NEET 2019 Solution View → 20

A biocontrol agent to be a part of an integrated pest management should be

NEET 2019 Solution View → 21

Which of the following can be used as a biocontrol agent in treatment of Plant diseases?

NEET 2019 Solution View → 22

This entry in the table is wrongly matched, identify.

NEET 2019 Solution View → 23

Match the following organisms with the products they produce: Column - I Column - II ( a ) Clostridium butylicum ( i ) Lactic acid ( b ) Saccharomyces cerevisiae ( ii ) Butyric

NEET 2019 Solution View → 24

Which of the following is a commercial blood cholesterol-lowering agent?

NEET 2019 Solution View → 25

Select the correct group of biocontrol agents.

NEET 2019 Solution View → 26

Conversion of milk to curd improves its nutritional value by increasing the amount of

NEET 2018 Solution View → 27

Roquefort cheese is ripened by using a

JIPMER 2017 Solution View → 28

Which of the following in sewage treatment removes suspended solids?

NEET 2017 Solution View → 29

Which of the following is correctly matched for the product produced by them?

NEET 2017 Solution View → 30

Which one of the following microbes is the source for vitamin-C?

JIPMER 2016 Solution View → 31

Biochemical Oxygen Demand (BOD) may not be a good index for pollution for water bodies receiving effluents from

NEET 2016 Solution View → 32

Match Column-I with Column-II and select the correct option using the codes given below : Column–I Column–II a. Citric acid (i) Trichoderma b. Cyclosporin A (ii)

NEET 2016 Solution View → 33

Which of the following is wrongly matched in the given table?

NEET 2016 Solution View → 34

A river with an inflow of domestic sewage rich in organic waste may result in:

NEET 2016 Solution View → 35

The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:

NEET 2016 Solution View → 36

Gas gangrene is caused by

JIPMER 2015 Solution View → 37

Match the following list of microbes and their importance: Column I Column II A Lactobacillus (i) Production of genetically-engineered clot busters B Monascus purpureus (ii)

NEET 2015 Solution View → 38

The high value of BOD (Biochemical Oxygen Demand) indicates that:

NEET 2015 Solution View → 39

Which of the following is non-symbiotic nitrogen fixer organism?

JIPMER 2014 Solution View → 40

Besides dung, the weed that can be used in biogas production is

JIPMER 2014 Solution View → 41

What gases are produced in anaerobic sludge digesters?

NEET 2014 Solution View → 42

Biological treatment of water pollution is done with the help of

JIPMER 2013 Solution View → 43

Microbe used for biocontrol of pest butterfly caterpillars:

NEET 2013 Solution View → 44

During sewage treatment, biogases are produced, which include

NEET 2013 Solution View → 45

A good producer of citric acid is

NEET 2013 Solution View → 46

Which of the following can be controlled by using biopesticides?

JIPMER 2012 Solution View → 47

Measuring Biochemical Oxygen Demand (BOD) is a method used for

NEET 2012 Solution View → 48

The most abundant prokaryotes helpful to human in making curd from milk and in production of antibiotics are the ones categorized as

NEET 2012 Solution View → 49

Yeast is used in the production of

NEET 2012 Solution View → 50

The domestic sewage in large cities

NEET 2012 Solution View → 51

Monascus purpureus is a yeast used commercially in the production of

NEET 2012 Solution View → 52

In gobar gas, the maximum amount is that of

NEET 2012 Solution View → 53

Which of the following is mainly produced by the activity of anaerobic bacteria on sewage?

NEET 2011 Solution View → 54

Secondary sewage treatment is mainly a

NEET 2011 Solution View → 55

Organisms called Methanogens are most abundant in a

NEET 2011 Solution View → 56

Ethanol is commercially produced through a particular species of

NEET 2011 Solution View → 57

Which one of the following is a wrong matching of a microbe and its industrial product, while the remaining three are correct?

NEET 2011 Solution View → 58

Continuous addition of sugars in 'fed batch' fermentation is done to

NEET 2011 Solution View → 59

When domestic sewage mixes with river water

NEET 2010 Solution View → 60

Select the correct statement from the following

NEET 2010 Solution View → 61

Streptomycin is obtained from

JIPMER 2009 Solution View → 62

In the treatment of waste water discharge, which treatment stage involves biological treatment?

JIPMER 2009 Solution View → 63

Biochemical Oxygen Demand (BOD) in a river water

NEET 2009 Solution View → 64

Which of the following is not used as a biopesticide?

NEET 2009 Solution View → 65

Which of the following plant species you would select for the production of bioethanol?

NEET 2009 Solution View → 66

Which one of the following pairs is wrongly matched?

NEET 2009 Solution View → 67

Autonomic nervous system affects

JIPMER 2008 Solution View → 68

What happened when we inoculated Rhizobium in wheat field?

JIPMER 2008 Solution View → 69

Trichoderma harzianum has proved a useful microorganism for

NEET 2008 Solution View → 70

Main objective of production/use of herbicide resistant GM crops is to

NEET 2008 Solution View → 71

Which one of the following pairs is wrongly matched?

NEET 2007 Solution View → 72

Lactic acid is produced by Rhizopus species :

JIPMER 2006 Solution View → 73

The non-photosynthetic, non-symbiotic N_2 fixing bacteria are

JIPMER 2005 Solution View → 74

Which one of the following is not used for disinfection of drinking water?

NEET 2005 Solution View → 75

A major component of gobar gas is:

NEET 2004 Solution View → 76

Which bacteria is utilized in Gobar gas plant?

NEET 2002 Solution View → 77

During the formation of bread it becomes porous due to the release of CO_2 by the action of:

NEET 2002 Solution View → 78

What are the major components of biological systems on earth?

NEET Solution View → 79

Where are microbes present?

NEET Solution View → 80

Where can microbes be found, even though no other life-form exists?

NEET Solution View → 81

What are the different types of microbes?

NEET Solution View → 82

What are lactic acid bacteria (LAB)?

NEET Solution View → 83

What is the role of LAB in our stomach?

NEET Solution View → 84

What is the reason for the puffed-up appearance of dough used for making foods such as dosa and idli?

NEET Solution View → 85

What type of yeast is used for fermenting dough used for making bread?

NEET Solution View → 86

What is the traditional drink of some parts of southern India made from?

NEET Solution View → 87

What gives Swiss cheese its characteristic large holes?

NEET Solution View → 88

What gives Roquefort cheese its specific flavour?

NEET Solution View → 89

What are the different varieties of cheese known by?

NEET Solution View → 90

What is the main function of bacteria in curd production?

NEET Solution View → 91

How is Swiss cheese characterised?

NEET Solution View → 92

Which microbe is commonly used for the production of alcoholic beverages like wine, beer, whisky, brandy, and rum?

NEET Solution View → 93

How are wine and beer produced compared to whisky, brandy, and rum?

NEET Solution View → 94

What is the term used for the large vessels used to grow microbes on an industrial scale for the production of valuable products?

NEET Solution View → 95

What is the term used for the metabolic reactions resulting in the production of ethanol by yeast?

NEET Solution View → 96

What does "Anti" in "Antibiotics" mean?

NEET Solution View → 97

Who discovered penicillin?

NEET Solution View → 98

What is penicillin used for?

NEET Solution View → 99

What is the Greek word for "against"?

NEET Solution View → 100

Who was awarded the Nobel Prize for the discovery of penicillin?

NEET Solution View → 101

What was the first antibiotic discovered?

NEET Solution View → 102

What is the full form of "bio" in "Antibiotics"?

NEET Solution View → 103

What is the function of antibiotics?

NEET Solution View → 104

What is the source of citric acid?

NEET Solution View → 105

What is the main purpose of antibiotics?

NEET Solution View → 106

Which was the first antibiotic to be discovered?

NEET Solution View → 107

What was the result of the discovery of Penicillin?

NEET Solution View → 108

What is the source of butyric acid?

NEET Solution View → 109

What is yeast (Saccharomyces cerevisiae) used for in commercial production?

NEET Solution View → 110

What is the role of lipases in detergent formulations?

NEET Solution View → 111

What clarifies bottled fruit juices?

NEET Solution View → 112

What is streptokinase used for?

NEET Solution View → 113

What is cyclosporin A used for?

NEET Solution View → 114

What is the function of statins?

NEET Solution View → 115

What microbe is used for enzyme production?

NEET Solution View → 116

What organism produces cyclosporin A?

NEET Solution View → 117

What is the major component of waste water generated in cities and towns?

NEET Solution View → 118

Can sewage be discharged directly into natural water bodies like rivers and streams?

NEET Solution View → 119

What is the purpose of sewage treatment plants (STPs)?

NEET Solution View → 120

What is the treatment of waste water carried out by?

NEET Solution View →
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