MCQOPTIONS
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MCQOPTIONS
This section includes 27 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Nitrogen fixing bacteria are associated with [EAMCET 1981; MP PMT 1988] |
| A. | Leguminasae |
| B. | Cruciferae |
| C. | Gramineae |
| D. | Malvaceae |
| Answer» D. Malvaceae | |
| 2. |
Milk is changed into curd by [MP PMT 2002] |
| A. | Acetobactor aceti |
| B. | Bacillus megatherium |
| C. | Xanthomonas citri |
| D. | None of these |
| Answer» E. | |
| 3. |
Which is not help in \[{{N}_{2}}\] fixation [RPMT 1999] |
| A. | Anabaena |
| B. | Nostoc |
| C. | Oscillatoria |
| D. | Rhizobium |
| Answer» D. Rhizobium | |
| 4. |
The bacteria found in nodules of family leguminoseae are [CPMT 1998] |
| A. | Rhizobium |
| B. | Azotobacter |
| C. | Nitrobacter |
| D. | None of these |
| Answer» B. Azotobacter | |
| 5. |
Which of the following groups of plants are highly useful in increasing soil fertility [CBSE PMT 1993] |
| A. | Red algae |
| B. | Fungi |
| C. | Bacteria |
| D. | Bryophytes |
| Answer» D. Bryophytes | |
| 6. |
The biological process carried on by Rhizobium is called [MP PMT 1995] |
| A. | Nitrification |
| B. | Ammonification |
| C. | Nitrogen fixation |
| D. | Fermentation |
| Answer» E. | |
| 7. |
The chemotherapeutic substance derived from living organism that has an inhibitory effect on parasitic organism is known as |
| A. | Exotoxin |
| B. | Bactericide |
| C. | Antibody |
| D. | Antibiotic |
| Answer» C. Antibody | |
| 8. |
Which of the following processes is performed only by bacteria |
| A. | Ripening of cheese |
| B. | Synthesis of antibiotics |
| C. | Humus formation |
| D. | Formation of vitamin 'K' in the intestine |
| Answer» D. Formation of vitamin 'K' in the intestine | |
| 9. |
Sugary solution is changed to vinegar by the action of |
| A. | Azotobacter |
| B. | Diplococcus |
| C. | Bacillus subtilis |
| D. | Mycoderma aciti |
| Answer» C. Bacillus subtilis | |
| 10. |
The most primitive in the following are [BHU 2005] |
| A. | Cyanobacteria |
| B. | Bryophytes |
| C. | Gymnosperms |
| D. | Monocots |
| Answer» B. Bryophytes | |
| 11. |
Nostoc is named after |
| A. | Fritsch |
| B. | Smith |
| C. | Vaucher |
| D. | R.N. Singh |
| Answer» D. R.N. Singh | |
| 12. |
Nitrogen fixation by Nostoc takes place in [MP PMT 1996; Orissa JEE 2004] |
| A. | Heterocysts |
| B. | Vegetative cells |
| C. | Akinetes |
| D. | Hormogonia |
| Answer» B. Vegetative cells | |
| 13. |
Which is not a cyanobacterium [AFMC 2002] |
| A. | Lyngbya |
| B. | Plectonema |
| C. | Anabaena |
| D. | Sinorhizobium |
| Answer» E. | |
| 14. |
Nostoc is a [MP PMT 1999; MHCET 2007] |
| A. | Cyanobacteria |
| B. | Beaded bacterium |
| C. | Bacteriophage |
| D. | Parasite |
| Answer» B. Beaded bacterium | |
| 15. |
Blue-green algae belong to [CPMT 1982] |
| A. | Myxomycetes |
| B. | The eukaryota |
| C. | The prokaryota |
| D. | Neither the eukaryota nor the prokaryota |
| Answer» D. Neither the eukaryota nor the prokaryota | |
| 16. |
Blue-green algae and bacteria show similarity in |
| A. | Both show anaerobic respiration |
| B. | Both show the presence of chlorophyll |
| C. | Both are devoid of true nucleus |
| D. | None of the above |
| Answer» D. None of the above | |
| 17. |
Which of the following granules are present in cyanobacteria |
| A. | Polyglucon granules |
| B. | Carboxysomes |
| C. | Gas vacuoles |
| D. | All the above |
| Answer» E. | |
| 18. |
Which of the following is coloured portion in the cell of Nostoc |
| A. | Chromoplasm |
| B. | Centroplasm |
| C. | Central body |
| D. | Genophore |
| Answer» B. Centroplasm | |
| 19. |
The existence of process of transformation in cyanobacteria has been experimentally established by |
| A. | Kumar |
| B. | Ueda |
| C. | Doolittle |
| D. | Rippka |
| Answer» D. Rippka | |
| 20. |
Magnesium ribonucleate is present in |
| A. | Gram negative bacteria |
| B. | Gram positive bacteria |
| C. | Both the above |
| D. | None of the above |
| Answer» C. Both the above | |
| 21. |
Heterocyst constitutes a |
| A. | Weakest link in trichome |
| B. | Strongest link in trichome |
| C. | In some trichomes it is a strong link |
| D. | It is not linked at all |
| Answer» B. Strongest link in trichome | |
| 22. |
Coccidiomycosis is caused by |
| A. | Coccidiodes |
| B. | Cryptococcus |
| C. | Fusarium |
| D. | Curvularia |
| Answer» B. Cryptococcus | |
| 23. |
A few organisms are known to grow and multiply at temperatures of \[100105{}^\circ C.\] They belong to [CBSE PMT 1998] |
| A. | Thermophilic subaerial fungi |
| B. | Marine archaebacteria |
| C. | Thermophilic sulphur bacteria |
| D. | Hot spring blue-green algae |
| Answer» C. Thermophilic sulphur bacteria | |
| 24. |
Bordetella pertusis causes |
| A. | Influenza |
| B. | Pneumonia |
| C. | Meningitis in young children |
| D. | Whooping cough |
| Answer» E. | |
| 25. |
"Crown gall'' is caused by[BHU 1995; CPMT 1998] |
| A. | Mycobacterium |
| B. | Bacteria |
| C. | Erwinia |
| D. | Clostridium |
| Answer» C. Erwinia | |
| 26. |
Assertion : Prokaryotic chromosome differs from a eukaryotic one by the absence of histone proteins. Reason : Bacterial cell is prokaryote. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» B. If both the assertion and reason are true but the reason is not a correct explanation of the assertion | |
| 27. |
Assertion : E. coli is the most studied prokaryotes. Reason : E. coli is Gram +ve bacteria. |
| A. | If both the assertion and the reason are true and the reason is a correct explanation of the assertion |
| B. | If both the assertion and reason are true but the reason is not a correct explanation of the assertion |
| C. | If the assertion is true but the reason is false |
| D. | If both the assertion and reason are false |
| E. | If the assertion is false but reason is true |
| Answer» D. If both the assertion and reason are false | |