MHT CET 202623 AprilEvening Shift
- Exam
- MHT CET
- Year
- 2026
- Date
- 23 April
- Shift
- Evening Shift
- Subject
- Biology
- Chapter
- Microbes in Human Welfare
MHT CET 2026 · 23 April · Evening Shift · Biology · Microbes in Human Welfare
Identify correct statements: Statement (I): Azotobacter is a free...
Identify correct statements:
Statement (I): Azotobacter is a free living, nitrogen-fixing bacteria.
Statement (II): It is an aerobic, non-photosynthetic, non-nodule-forming bacteria
Statement (III): It is used as a biofertlizer for all leguminous plants.
Statement (IV): It is intimately associated with the roots of Gymnosperms.
Statement (I): Azotobacter is a free living, nitrogen-fixing bacteria.
Statement (II): It is an aerobic, non-photosynthetic, non-nodule-forming bacteria
Statement (III): It is used as a biofertlizer for all leguminous plants.
Statement (IV): It is intimately associated with the roots of Gymnosperms.
Options
- AAll statements are correct
- BAll statements are wrong
- CStatement (I) and (II) are correct but (III) and (IV) are incorrect
- DStatement (III) and (IV) are correct but (I) and (II) are incorrect
Correct answer
C. Statement (I) and (II) are correct but (III) and (IV) are incorrect
Step-by-step solution
Statement (I) is correct because Azotobacter is a free-living, nitrogen-fixing bacterium found in soil.
Statement (II) is correct as it is an aerobic, non-photosynthetic, and non-nodule-forming bacterium.
Statement (III) is incorrect because Rhizobium is the symbiotic nitrogen-fixing bacterium used as a biofertilizer for leguminous plants, whereas Azotobacter is generally used for non-leguminous crops.
Statement (IV) is incorrect because Azotobacter is free-living in the soil and is not intimately associated with the roots of gymnosperms. Cyanobacteria like Anabaena are associated with the coralloid roots of gymnosperms like Cycas.
Thus, Statements (I) and (II) are correct, while (III) and (IV) are incorrect.
Answer: Statement (I) and (II) are correct but (III) and (IV) are incorrect
Statement (II) is correct as it is an aerobic, non-photosynthetic, and non-nodule-forming bacterium.
Statement (III) is incorrect because Rhizobium is the symbiotic nitrogen-fixing bacterium used as a biofertilizer for leguminous plants, whereas Azotobacter is generally used for non-leguminous crops.
Statement (IV) is incorrect because Azotobacter is free-living in the soil and is not intimately associated with the roots of gymnosperms. Cyanobacteria like Anabaena are associated with the coralloid roots of gymnosperms like Cycas.
Thus, Statements (I) and (II) are correct, while (III) and (IV) are incorrect.
Answer: Statement (I) and (II) are correct but (III) and (IV) are incorrect