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Microbes in Human Welfare

Previous year questions with solutions · 2000 – 2026

78Questions
33Papers covered
2.97% ↓59.9%Weightage in 2026
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’01
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Year-wise statistics questions · papers · average per paper · weightage
YearQuestionsPapersAvg / paperWeightage
2026321.52.97% ↓59.9%
20254147.41% ↑322.2%
20242211.75% ↑129.8%
2022120.50.76% ↓54.2%
20211111.67% ↓58.3%
20202124.00% ↓47%
20194147.55% ↑315.1%
20181111.82% ↓65.5%
20173135.26% ↑505.3%
2016120.50.87% ↓52.6%
20152211.83% ↑2.8%
20141111.79% ↓0.9%
20132211.80% ↓79.4%
2012924.58.74% ↓30.1%
2011122612.50% ↑125%
2010522.55.56% ↓22.2%
20094147.14% ↑31%
20083135.45% ↓7.3%
20073135.88% ↑247.1%
20061111.69% ↑6.8%
20051111.59% ↓78.2%
20044147.27% ↑125.5%
20032123.23% ↑3.2%
20022123.12% ↓38.5%
20013135.08% ↑37.3%
20002123.70%

⚠ 4 of these questions are out of the current syllabus (marked on the question).

71 questions · newest paper first · page 3 of 3

61

Which one of the following pairs is not correctly matched ?

  1. Spirulina – Single cell protein
  2. Streptomyces – Antibiotic
  3. Rhizobium – Biofertilizer
  4. Serratia – Drug addiction
AIPMT 2004
62

A major component of gobar gas is

  1. ethane
  2. methane
  3. butane
  4. ammonia
AIPMT 2004
63

Which of the following plants are used as green manure in crop fields and in sandy soils ?

  1. Calotropis procera and Phyllanthus niruri
  2. Dichanthium annulatum and Azolla nilotica
  3. Saccharum munja and Lantana camara
  4. Crotalaria juncea and Alhagi camelorum
AIPMT 2003
64

During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded :-

  1. Lignin
  2. Cellulose
  3. Hemi-cellulose
  4. Lipids
AIPMT 2003
65

Which bacteria is utilized in Gobar gas plant ?

  1. Nitrifying bacteria
  2. Methanogens
  3. Ammonifying bacteria
  4. Denitrifying bacteria
AIPMT 2002
66

During the formation of bread it becomes porous due to release of CO2 by the action of : -

  1. Protozoans
  2. Bacteria
  3. Yeast
  4. Virus
AIPMT 2002
67

Which of the following is a true pair of biofertilizers?

  1. Nostoc and legume
  2. Rhizobium and grasses
  3. Salmonella and E. coli
  4. Azolla and BGA
AIPMT 2001
68

Which aquatic fern performs nitrogen fixation?

  1. Azolla
  2. Nostoc
  3. Salvia
  4. Salvinia
Out of syllabusAIPMT 2001
69

What is B.O.D.?

  1. The total amount of O2 present in water
  2. The amount of O2 utilised by organisms in water
  3. The amount of O2 utilised by microorganisms for decomposition
  4. All of the above
Out of syllabusAIPMT 2001
70

Which aquatic fern is used to increase the yield in paddy crop?

  1. Salvinia
  2. Isoetes
  3. Marsilea
  4. Azolla
AIPMT 2000
71

Which of the following is used to manufacture ethanol from starch?

  1. Saccharomyces
  2. Lactobacillus
  3. Azotobacter
  4. Penicillium
AIPMT 2000