InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
What type of nutrition found in purple and green sulphur bacteriaA. PhotoautotrophicB. ChemoautotrophicC. PhotoheterotrophicD. Saprotrophic |
| Answer» Correct Answer - A | |
| 2. |
The bacterium which reduces the fertility of soil isA. NitrosomonasB. Bacillus denitrificansC. Azotobacter sp.D. Nitrobacter. |
| Answer» Correct Answer - B | |
| 3. |
Fertility of paddy fields is improved by addition ofA. RhizobiaB. GypsumC. Sodium sulphateD. Blue- Green Algea |
| Answer» Correct Answer - D | |
| 4. |
Blue green algae used in rice fields to increase fertility isA. RivulariaB. NostocC. AulosiraD. Anabaena. |
| Answer» Correct Answer - C | |
| 5. |
Which one causes food poisoningA. AzotobacterB. NitrosomonasC. NitrobacterD. Clostridium botulinum. |
| Answer» Correct Answer - D | |
| 6. |
Bacteria have incipient nucleus (nucleoid ) and hence they are placed inA. ProkaryotaB. EukaryotaC. FungiD. Protista. |
| Answer» Correct Answer - A | |
| 7. |
Blast of Rice is caused byA. XanthomonasB. PseudomonasC. PhytophthoraD. Gibberella. |
| Answer» Correct Answer - A | |
| 8. |
Nostoc fixes nitrogen in the symbiotic association of the following 1. Alnus 2. Gunnera 3. Anthoceros 4. Casuarina. The correct combination isA. 1 and 2B. 1 and 3C. 1 and 4D. 2 and 3. |
| Answer» Correct Answer - D | |
| 9. |
Select the correct match `|{:(A.,"Nitrosomonas",-,"Nitrite to nitrate"),(B.,"Thiobacillus",-,"Denitrification"),(C.,"Nostoc",-,"Free-living nitrogen-fixer"),(D.,"Azotobacter",-,"Anaerobic nitrogen-fixer"):}|`A. (a)-(ii), (b)-(iv),(c )-(iii),(d)-(i)B. (a)-(iii),(b)-(iv),(c )-(ii),(d)-(i)C. (a)-(iv),(b)-(ii),(c )-(i),(d)-(iii)D. (a)-(i),(b)-(ii),( c)-(iii),(d)-(iv) |
| Answer» Correct Answer - B | |
| 10. |
Nucleoid isA. Extrachromosomal genetic materialB. Nuclear material of VolvoxC. Nuclear material in bacteriaD. Extrachromosomal DNA in bacteria. |
| Answer» Correct Answer - C | |
| 11. |
Transformation experiments were first performed over bacterumA. Escherichia coliB. Salmonlla typhimuriumC. Diplococcus pneumoniaeD. Pasteurella pestis. |
| Answer» Correct Answer - B | |
| 12. |
In transformationA. DNA segment of a dead relative enters a living cell and replaces homologous sectionB. Chromosomal mutation takes placeC. DNA is duplicatedD. RNA is duplicated. |
| Answer» Correct Answer - A | |
| 13. |
Specialised cells for fixing atmospheric nitrogen in Nostoc areA. HormogoniaB. NodulesC. AkinetesD. Heterocysts. |
| Answer» Correct Answer - D | |
| 14. |
Conjugation in bacteria was discovered by Or The sexuality in bacteria was established byA. Lederberg and TatumB. Zinder and LederbergC. Watson and CrickD. Hershey and chase. |
| Answer» Correct Answer - A | |
| 15. |
Transformation in Diplococcus by heat- killed extract was discovered byA. BrownB. GriffithC. FlemingD. McLeod. |
| Answer» Correct Answer - B | |
| 16. |
Which one of following can fix nitrogen ?A. MycoplasmaB. AzotobacterC. AnabaenaD. Both B and C. |
| Answer» Correct Answer - D | |
| 17. |
Which one is the smallest organism capable of autonomous growth and reproduction Or Which among the following are the smallest living cells, known without a definite cell wall, pathogenic to plants as well as animals and can survive without oxygenA. BacteriaB. VirusesC. MycoplasmaD. Actinomycetes. |
| Answer» Correct Answer - C | |
| 18. |
Diaminopimelic acid and muramic acid occur in the wall ofA. BacteriaB. FungiC. Brown algaeD. Higher plants. |
| Answer» Correct Answer - A | |
| 19. |
Biofertiliser for Soya Bean crop isA. RhizobiumB. NotocC. AzotobacterD. Azospirillum. |
| Answer» Correct Answer - A | |
| 20. |
Nitrosomonas and Nitrobacter convertA. Carbon dioxide to carbohydratesB. Ammonium ion into nitrateC. Nitrate ion into nitrogen moleculeD. Nitrogen into nitrate. |
| Answer» Correct Answer - B | |
| 21. |
Match the lists `{:(,"I" ,,"II"),(,(a),"Syphilis",(1)"Acetobacter"),(,(b),"Pathogen of cattle",(iii)"Agrobacterium"),(,(c),"Crown gall of apple",(iii) "Corynebacterium"),(,(d),"Diphtheria",(iv)"Mycobacterium"):}`A. `{:(,a,b,c,d),((A),iii,i,iv,ii):}`B. `{:(,a,b,c,d),((B),v,iv,ii,iii):}`C. `{:(,a,b,c,d),((C),v,iii,ii,i):}`D. `{:(,a,b,c,d),((C),ii,iv,v,iii):}` |
| Answer» Correct Answer - B | |
| 22. |
Match the lists `{:(,"I" ,,"II"),(,(a),"Nitrosomonas",(1)"Denitrifying bacteria "),(,(b),"Nitrobacter",(2)"Soil bacteria"),(,(c),"Pseudomonas",(3) "Nitrate bacteria"),(,(d),"Azotobacter",(4)"Nitrite bacteria"):}`A. `{:(,a,b,c,d),((A),4,3,1,2):}`B. `{:(,a,b,c,d),((B),1,2,4,3):}`C. `{:(,a,b,c,d),((C),4,3,2,1):}`D. `{:(,a,b,c,d),((D),2,3,1,4):}` |
| Answer» Correct Answer - A | |
| 23. |
Whan a bacterial cell possesses a flagellum on its anteriop and posteriop sides ,the condition is calledA. PeritrichousB. LophotrichousC. AmphitrichousD. Monotrichous. |
| Answer» Correct Answer - C | |
| 24. |
Which is absent in procaryotes ?A. Nuclear envelopeB. Golgi apparatusC. MitochondriaD. All the above. |
| Answer» Correct Answer - D | |
| 25. |
Which one is included under procaryotes?A. MycoplasmaB. AlgaeC. UlothrixD. Mycoplasma and Blue- Green Algae. |
| Answer» Correct Answer - D | |
| 26. |
Which one is present in procaryotes ?A. NucleusB. Golgi apparatusC. MitochondriaD. None of the above. |
| Answer» Correct Answer - D | |
| 27. |
In prokaryotes , chromatophores areA. Specialised granules responsible for colouration of cellsB. Structures responsible for determining shape of the organismC. Inclusion bodies lying free in the cells for carrying out various metabolic activitesD. Internal membrane system that may bacome extensive and complex in photosynthetic bacteria. |
| Answer» Correct Answer - D | |
| 28. |
Bacteria involved in two -step conversion of ammonia into nitrate areA. Azotobacter and NitrosomonasB. Pseudomonas and NitrobacterC. Azotobacter and AchromobacterD. |
| Answer» Correct Answer - D | |
| 29. |
Procaryotes cells are characterised byA. Absence of nuclear envelopeB. Presence of nuclear envelopeC. Presence of distinct chromosomeD. Absence of chromation material. |
| Answer» Correct Answer - A | |
| 30. |
Prokaryotes are characterised byA. Absence of internal compartmentalisationB. Absence of nucleusC. 80 S ribosomesD. All the above. |
| Answer» Correct Answer - D | |
| 31. |
Diphtheria is characterised byA. Gum bleedingB. SuffocationC. HydrophobiaD. Dehydration. |
| Answer» Correct Answer - B | |
| 32. |
Match the columns and bring out correct option of inhibitor and its effect `{:(,"Column I",,"ColumnII"),(a,"Chloramphenicol",p,"inhibits binding of aatRNA to ribosome"),(b,"Erthromycin",q,"inhibits interaction between tRNA and mRNA"),(c,"Neomycin",r,"Inhibits initia-tion of translation "),(d,"Streptomycin",s,"Inhibits peptidyl transferase activity"),(e,"Tetracycline",t,"Inhibits translocation of mRNA over ribosome"):}`A. a-p,b-q,c-r,d-t,e-sB. a-r,b-p,c-t,d-s,e-qC. a-q,b-r,c-s,d-p,e-tD. a-s,b-t,c-q,d-r,e-p |
| Answer» Correct Answer - D | |
| 33. |
Chloramphenicol and erythormycin (broad spectrum antibiotics) are produced byA. RhizobiumB. StreptomycesC. PenicilliumD. Nitrobacter. |
| Answer» Correct Answer - B | |
| 34. |
Bacterial endotoxin isA. Lipopolysaccharide over the surfaceB. Protein inside the cellC. An excreted proteinD. None of the above. |
| Answer» Correct Answer - A | |
| 35. |
Statements regarding Frankia are correct exceptA. Induction of root nodules in many plant speciesB. Like Rhizobium, it infects host through root hair and induces proliferation of cortexC. Form specialised vesicles in which nitrogenase is protected from oxygen by a chemical barrier involving triterpene hopanoidsD. Cannot fix nitrogen in free state. |
| Answer» Correct Answer - D | |
| 36. |
A bacteriim becomes resistant to sntibiotic except byA. Making enzyme for drug degradationB. Developing impermeability to drugC. Modification of drugD. Moving away from drug. |
| Answer» Correct Answer - D | |
| 37. |
What is the photosynthetic product in blue-green algaeA. GlycerophosphateB. Glycogen likeC. GlucosideD. Globulin. |
| Answer» Correct Answer - B | |
| 38. |
Heating food and water will check diseases exceptA. Salmonella infectionB. CholeraC. Hepatitis -BD. Botulism. |
| Answer» Correct Answer - C | |
| 39. |
Which one of the following sets includes bacterial diseases ?A. Cholera, typhoid, mumpsB. Tetanus, Tuberculosis, MeaslesC. Malaria , Mumps, PoliomyelitisD. Diphtheria, Leprosy , Plague. |
| Answer» Correct Answer - D | |
| 40. |
Which is wall -less and smallest living cellA. AlgaeB. BacteriophageC. CyanobacteriaD. Mycoplasma. |
| Answer» Correct Answer - D | |
| 41. |
Photosynthetic bacteria includeA. Nitrobacter and NitrosomonasB. Chlorobium and RhodospirillumC. StreptococcusD. Chlorobium and Clostridium. |
| Answer» Correct Answer - B | |
| 42. |
The smallest organisms which cause diseases among plants areA. VirusesB. FungiC. BacteriaD. Mycoplasma. |
|
Answer» Correct Answer - D viruses are not considered to be organisms. |
|
| 43. |
Pigments phycocyanin occur inA. BacillariophyceaeB. ArchaebacteriaC. EubacteriaD. Cyanobacteria |
| Answer» Correct Answer - D | |
| 44. |
Nitrosomonas is aA. PhotoautotrophB. ChemoautotrophC. ChemoheterotrophD. Photoheterotroph. |
| Answer» Correct Answer - B | |
| 45. |
In photosynthetic bacteria, the pigments occur inA. ChloroplastsB. ChromatoplastsC. ChromatophoresD. Leucoplasts. |
| Answer» Correct Answer - C | |
| 46. |
Smallest organisms, self reproducing in free living state areA. BacteriaB. PPLOC. PrionsD. Viruses. |
| Answer» Correct Answer - B | |
| 47. |
Nitrosomonas changesA. Nitrite to nitrateB. Nitrogen to ammoniaC. Ammonia to nitrogenD. Ammonia to nitrite. |
| Answer» Correct Answer - D | |
| 48. |
Organisms without any specific shape areA. VirusesB. MycoplasmaC. BacteriaD. Cyanobacteria. |
| Answer» Correct Answer - B | |
| 49. |
Which of the following is a non-symbiotic nitrogen fixing prokaryote?A. AzotobacterB. PseudomonasC. Soil FungiD. Blue- Green Algae. |
| Answer» Correct Answer - A | |
| 50. |
Nitrogen fixing organism which can be free as well as symbiotic isA. AnabaenaB. AzotobacterC. LiverwortsD. Mossess. |
| Answer» Correct Answer - B | |