Which one of the following pairs is not correctly matched ?
- Spirulina – Single cell protein
- Streptomyces – Antibiotic
- Rhizobium – Biofertilizer
- Serratia – Drug addiction
Previous year questions with solutions · 2000 – 2026
| Year | Questions | Papers | Avg / paper | Weightage |
|---|---|---|---|---|
| 2026 | 3 | 2 | 1.5 | 2.97% ↓59.9% |
| 2025 | 4 | 1 | 4 | 7.41% ↑322.2% |
| 2024 | 2 | 2 | 1 | 1.75% ↑129.8% |
| 2022 | 1 | 2 | 0.5 | 0.76% ↓54.2% |
| 2021 | 1 | 1 | 1 | 1.67% ↓58.3% |
| 2020 | 2 | 1 | 2 | 4.00% ↓47% |
| 2019 | 4 | 1 | 4 | 7.55% ↑315.1% |
| 2018 | 1 | 1 | 1 | 1.82% ↓65.5% |
| 2017 | 3 | 1 | 3 | 5.26% ↑505.3% |
| 2016 | 1 | 2 | 0.5 | 0.87% ↓52.6% |
| 2015 | 2 | 2 | 1 | 1.83% ↑2.8% |
| 2014 | 1 | 1 | 1 | 1.79% ↓0.9% |
| 2013 | 2 | 2 | 1 | 1.80% ↓79.4% |
| 2012 | 9 | 2 | 4.5 | 8.74% ↓30.1% |
| 2011 | 12 | 2 | 6 | 12.50% ↑125% |
| 2010 | 5 | 2 | 2.5 | 5.56% ↓22.2% |
| 2009 | 4 | 1 | 4 | 7.14% ↑31% |
| 2008 | 3 | 1 | 3 | 5.45% ↓7.3% |
| 2007 | 3 | 1 | 3 | 5.88% ↑247.1% |
| 2006 | 1 | 1 | 1 | 1.69% ↑6.8% |
| 2005 | 1 | 1 | 1 | 1.59% ↓78.2% |
| 2004 | 4 | 1 | 4 | 7.27% ↑125.5% |
| 2003 | 2 | 1 | 2 | 3.23% ↑3.2% |
| 2002 | 2 | 1 | 2 | 3.12% ↓38.5% |
| 2001 | 3 | 1 | 3 | 5.08% ↑37.3% |
| 2000 | 2 | 1 | 2 | 3.70% |
⚠ 4 of these questions are out of the current syllabus (marked on the question).
Which one of the following pairs is not correctly matched ?
A major component of gobar gas is
Which of the following plants are used as green manure in crop fields and in sandy soils ?
During anaerobic digestion of organic waste, such as in producing biogas, which one of the following is left undegraded :-
Which bacteria is utilized in Gobar gas plant ?
During the formation of bread it becomes porous due to release of CO2 by the action of : -
Which of the following is a true pair of biofertilizers?
Which aquatic fern performs nitrogen fixation?
What is B.O.D.?
Which aquatic fern is used to increase the yield in paddy crop?
Which of the following is used to manufacture ethanol from starch?