MCQ on Agricultural Microbiology: Dear Aspirants, Most important Agricultural Microbiology Objective Multiple Choice Questions and Answers useful for General Agriculture for ICAR ARS NET Exams and other JRF, SRF, Ph.D., M.Sc. IBPS, AFO, AO, IFS, NABARD Agri Competitive exams and Tests.
1. Example of Eukaryotic inhibitor antibiotic–
(A) Cycloheximide✓ (B) Penicillium
(C) Tetracycline (D) Streptomycin
2. A virion is a–
(A) Infectious nucleic acid (B) Infectious virus particle✓
(C) A virus parasite on bacteria (D) None of these
3. Urea degrading bacteria–
(A) Bacillus pasturi✓ (B) Clostridium pasteurianum
(C) A. Niger (D) Micrococcus sp
4. Example of Chemolithotroph–
(A) E. Coli (B) Bacillus
(C) Azotobacter (D) Nitrosomonas✓
5. Root surface that can be colonized by the microbes–
(A) Rhizosphere (B) Rhizoplane✓
(C) Both (D) None of these
6. Nitrat reductase enzyme present in–
(A) Cytoplasm✓ (B) Chloroplast
(C) Mitochondria (D) Nucleus
7. Microbe involved in Fibre retting–
(A) Micrococcus sp (B) Bacillus subtilis
(C) Clostridium butrfcium✓ (D) Lactobacillus sp
8. In bacteria, cubical packets of 8 cells is called–
(A) Staphylococcus (B) Diplococcus
(C) Bacillus (D) Sarcina✓
9. Fungi used for bioassay of pantothenic acid–
(A) Yeast✓ (B) Neurospora
(C) Mucor- (D) Aspergillus
10. Ropiness of unpacked bread is due to growth of–
(A) Bacillus subtilis✓ (B) Clostridium sp.
(C) A: Niger (D) Streptococcus sp.
11. Microbe involved in tobacco curing–
(A) Micrococcus sp.✓ (B) Bacillus subtilis
(C) Lactobacillus sp. (D) Aspergillus niger
12. Lactose sugar of milk is converted into Lactic acid by–
(A) Streptococcus lactis (B) Lactobacillus sp.✓
(C) Clostridium sp. (D) None of these
13. Which of the following is used to detect the presence of HIV ?
(A) ELISA test✓ (B) Benedict s test
(C) Widal test (D) Biuret's test
14. Prions are–
(A) Organism containing only nucleic acid
(B) Proteins which are capable of replications in certain mammalian cells✓
(C) Small cells which are infectious
(D) Fungal toxins
15. Which bacterium solublizes tricalcium phosphate in'soluble rock phosphates in soils?
(A) Bacillus polymyxa (B) Pseudomonas striata✓
(C) Spirillum lipoferum (D) Both (A) and (B)
16. Example of VAM fungi–
(A) Pisoletecis (B) Sclerotenia
(C) Glomus✓ (D) Trichoderma
17. Lysozyme treated Cells of gram -ve bacteria are called–
(A) Protoplast (B) Sphaeroplast✓
(C) Cytoplasm (D) Mesosomes
18. Bacteria having especially high rate of respiration–
(A) Rhizobium (B) Azotobacter✓
(C) E. Coli (D) Acetobacter
19. Xanthomonas is an example of–
(A) Monotrichous✓ (B) Peritrichous
(C) Lophotrichous (D) Cephalotrichous
20. 'Ray Fungi' is the name given to–
(A) Rhizopus (B) Yeast
(C) Actinomycetes✓ (D) Mycoplasma
21. Causal organism of Q. fever–
(A) Coexiella bumetti✓ (B) Salmonella sp.
(C) E. Coli (D) None of these
22. Vitamin B2 is produced by–
(A) Ashbya gossypii✓ (B) Pseudomonas
(C) Brevibacterium sp (D) None of the above
23. Production of Vinegar is by–
(A) Bacillus subtilis (B) Glucanobacter✓
(C) Azotobacter (D) None of the above
24. Neomycin is produced by–
(A) S. Nouesii (B) S. fradiae✓
(C) S. erthsjreus . (D) S. Yenezuelea
25. Which one of the following is used for commercial production of Vitamin B12 ?
(A) Brevibacterium (B) Mycobacterium
(C) Propionibacterium✓ (D) None
26. Amylases produced by–
(A) Aspergillus sp. (B) Bacillus sp.
(C) Both (D) None of these
27. Name the scientists involved in commercial production of Penicillin
(A) Alexander Flemming (B) Florey & Chain✓
(C) Tulsane Brothers (D) Louis Pasteur
28. Development of plants due to increasein number of cells is called–
(A) hypertrophy (B) hypotrophy
(C) hyperplasia✓ (D) hypoplasia
29. If 10 % of the population of cells is killed In general, an ideal antimicrobial chemical agent have a spectrum activity–
(A) Limited (B) Broad✓
(C) Narrow (D) None of the above
30. If broth culture of following are heated in boiling water for 10 min. which culture is most likely to be sterilized–
(A) Bacillus sp (B) Pseudomonas sp✓
(C) Clostridium sp (D) None of the above
31. UV light are microcidal due to the formation of–
(A) Pyrine dimers (B) Pyrimidine dimer✓
(C) DNA damage (D) RNA damage
32. Ethylene oxide exhibits its antimicrobial activity by reaction–
(A) Oxidation (B) Hydrogenation
(C) Reduction (D) Alkylation✓
33. The low pH of media inhibits the growth of–
(A) Bacteria✓ (B) Molds
(C) Both (D) None
34. The invaginations seen at localised areas specially near the site of cell division and participate in transverse septum formation is called–
(A) Lysosomes (B) Mesosomes✓
(C) Murein (D) Capsules
35. Funaric acid is produced by–
(A) Aspergillus terms (B) Rhizopus nigricans✓
(C) Aspergillus niger (D) Aspergillus fumigatus
36. Who proposed new grouping of living organisms into 3 kingdom i.e. Archaebacteria, Eubacteria and Eukaryotes ?
(A) Eichels (B) Woose✓
(C) Haeckel (D) Chester
1. Example of Eukaryotic inhibitor antibiotic–
(A) Cycloheximide✓ (B) Penicillium
(C) Tetracycline (D) Streptomycin
2. A virion is a–
(A) Infectious nucleic acid (B) Infectious virus particle✓
(C) A virus parasite on bacteria (D) None of these
3. Urea degrading bacteria–
(A) Bacillus pasturi✓ (B) Clostridium pasteurianum
(C) A. Niger (D) Micrococcus sp
4. Example of Chemolithotroph–
(A) E. Coli (B) Bacillus
(C) Azotobacter (D) Nitrosomonas✓
5. Root surface that can be colonized by the microbes–
(A) Rhizosphere (B) Rhizoplane✓
(C) Both (D) None of these
6. Nitrat reductase enzyme present in–
(A) Cytoplasm✓ (B) Chloroplast
(C) Mitochondria (D) Nucleus
7. Microbe involved in Fibre retting–
(A) Micrococcus sp (B) Bacillus subtilis
(C) Clostridium butrfcium✓ (D) Lactobacillus sp
8. In bacteria, cubical packets of 8 cells is called–
(A) Staphylococcus (B) Diplococcus
(C) Bacillus (D) Sarcina✓
9. Fungi used for bioassay of pantothenic acid–
(A) Yeast✓ (B) Neurospora
(C) Mucor- (D) Aspergillus
10. Ropiness of unpacked bread is due to growth of–
(A) Bacillus subtilis✓ (B) Clostridium sp.
(C) A: Niger (D) Streptococcus sp.
11. Microbe involved in tobacco curing–
(A) Micrococcus sp.✓ (B) Bacillus subtilis
(C) Lactobacillus sp. (D) Aspergillus niger
12. Lactose sugar of milk is converted into Lactic acid by–
(A) Streptococcus lactis (B) Lactobacillus sp.✓
(C) Clostridium sp. (D) None of these
13. Which of the following is used to detect the presence of HIV ?
(A) ELISA test✓ (B) Benedict s test
(C) Widal test (D) Biuret's test
14. Prions are–
(A) Organism containing only nucleic acid
(B) Proteins which are capable of replications in certain mammalian cells✓
(C) Small cells which are infectious
(D) Fungal toxins
15. Which bacterium solublizes tricalcium phosphate in'soluble rock phosphates in soils?
(A) Bacillus polymyxa (B) Pseudomonas striata✓
(C) Spirillum lipoferum (D) Both (A) and (B)
16. Example of VAM fungi–
(A) Pisoletecis (B) Sclerotenia
(C) Glomus✓ (D) Trichoderma
17. Lysozyme treated Cells of gram -ve bacteria are called–
(A) Protoplast (B) Sphaeroplast✓
(C) Cytoplasm (D) Mesosomes
18. Bacteria having especially high rate of respiration–
(A) Rhizobium (B) Azotobacter✓
(C) E. Coli (D) Acetobacter
19. Xanthomonas is an example of–
(A) Monotrichous✓ (B) Peritrichous
(C) Lophotrichous (D) Cephalotrichous
20. 'Ray Fungi' is the name given to–
(A) Rhizopus (B) Yeast
(C) Actinomycetes✓ (D) Mycoplasma
21. Causal organism of Q. fever–
(A) Coexiella bumetti✓ (B) Salmonella sp.
(C) E. Coli (D) None of these
22. Vitamin B2 is produced by–
(A) Ashbya gossypii✓ (B) Pseudomonas
(C) Brevibacterium sp (D) None of the above
23. Production of Vinegar is by–
(A) Bacillus subtilis (B) Glucanobacter✓
(C) Azotobacter (D) None of the above
24. Neomycin is produced by–
(A) S. Nouesii (B) S. fradiae✓
(C) S. erthsjreus . (D) S. Yenezuelea
25. Which one of the following is used for commercial production of Vitamin B12 ?
(A) Brevibacterium (B) Mycobacterium
(C) Propionibacterium✓ (D) None
26. Amylases produced by–
(A) Aspergillus sp. (B) Bacillus sp.
(C) Both (D) None of these
27. Name the scientists involved in commercial production of Penicillin
(A) Alexander Flemming (B) Florey & Chain✓
(C) Tulsane Brothers (D) Louis Pasteur
28. Development of plants due to increasein number of cells is called–
(A) hypertrophy (B) hypotrophy
(C) hyperplasia✓ (D) hypoplasia
29. If 10 % of the population of cells is killed In general, an ideal antimicrobial chemical agent have a spectrum activity–
(A) Limited (B) Broad✓
(C) Narrow (D) None of the above
30. If broth culture of following are heated in boiling water for 10 min. which culture is most likely to be sterilized–
(A) Bacillus sp (B) Pseudomonas sp✓
(C) Clostridium sp (D) None of the above
31. UV light are microcidal due to the formation of–
(A) Pyrine dimers (B) Pyrimidine dimer✓
(C) DNA damage (D) RNA damage
32. Ethylene oxide exhibits its antimicrobial activity by reaction–
(A) Oxidation (B) Hydrogenation
(C) Reduction (D) Alkylation✓
33. The low pH of media inhibits the growth of–
(A) Bacteria✓ (B) Molds
(C) Both (D) None
34. The invaginations seen at localised areas specially near the site of cell division and participate in transverse septum formation is called–
(A) Lysosomes (B) Mesosomes✓
(C) Murein (D) Capsules
35. Funaric acid is produced by–
(A) Aspergillus terms (B) Rhizopus nigricans✓
(C) Aspergillus niger (D) Aspergillus fumigatus
36. Who proposed new grouping of living organisms into 3 kingdom i.e. Archaebacteria, Eubacteria and Eukaryotes ?
(A) Eichels (B) Woose✓
(C) Haeckel (D) Chester
37. Microaerophillic N2 fixing bacteria–
(A) Azotobacter (B) Azospirillium✓
(C) Oostridium (D) Enterobacter
38. Father of Soil Microbiology is–
(A) Winogradsky✓ (B) Beirjenick
(C) Spermi (D) Hiltner
39. Glycolysis inhibition in the presence of oxygen is called–
(A) Warburg effect (B) Hypoglycolytic effect
(C) Pasteur effect✓ (D) None of the above of these
40. Murein is present in–
(A) Cyanobacteria✓ (B) Halobacterium
(C) Methanobacterium (D) None of these
(A) Azotobacter (B) Azospirillium✓
(C) Oostridium (D) Enterobacter
38. Father of Soil Microbiology is–
(A) Winogradsky✓ (B) Beirjenick
(C) Spermi (D) Hiltner
39. Glycolysis inhibition in the presence of oxygen is called–
(A) Warburg effect (B) Hypoglycolytic effect
(C) Pasteur effect✓ (D) None of the above of these
40. Murein is present in–
(A) Cyanobacteria✓ (B) Halobacterium
(C) Methanobacterium (D) None of these
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