MCQ on Agricultural Microbiology
1. Founder of modern bacteriology is–
(A) Leeuwenhoek (B) Pasteur
(C) Robert Koch (D) None of the above
2. Braun's lipoprotein is present. in–
(A) Gram+ve bacteria (B) Gram-ve bacteria
(C) Bacteriophage (D) Yeast
3. Pseudomorein is an organism?
(A) Archaebacteria (C) Eukaryote present in which
(B) Eubacteria (D) Fungi
4. The most resistant form of microbial life in
the bacteria is–
(A) Cyst (B)
Endospore
(C) Vegetative stage (D) None
5. Species of Mycoplasma are inhibited by–
(A) Penicillin (B)
Tetramycin
(C) Both (D) None of the above
6. Example for microaerophilic N 2 fixer–
(A) Rhizobium (B) Azotobacter
(C) E. Coli (D)
Frankia
7. First" Antifungal antibiotic–
(A) Cycloheximide (B) Aureofungin
(C) Neomycin (D)
Nystatin
8. In general, an ideal antimicrobial chemical
agenthase a spectrum activity–
(A) Limited (B)
Broad
(C) Narrow (D) None
9. The term Mycorrhiza is coined by–
(A) Frank (B) Hartig
(C) De bary (D) Winogradasky
10. Which of the following insecticides ?
(A) Bacillus thuringiensis (B) Bacillus
popilliae
(C) Both (A) and (B) (D) None of the above
11. A substance that can elicit an immune
response only when combined with another carrier–
(A) O antigen (B)
Haptan
(C) Adjent (D) Immunogen
12. Factor which does not affect legume root
nodulation ?
(A) Temperature (B)
Light
(C) Combined N 2 (D) H + ion cone.
13. In leghaemoglobin the heme portion is
specified by
(A) Plantgenes (B)
Bacterial genes
(C) Both (D) None of these
14. Cell - Cell interaction and differentiation
is mostly studied on–
(A) Arabidopsis thaliana (B) Cenorabditis
elegens
(C) Escherichia coli (D) Dictyostlium discodeum
15. Bacteria which can ferment sugar faster than
yeast is–
(A) Oostridium (B)
Zygomonas
(C) Thiobacillus (D) Bacillus
16. First antifugal
antibiotic is–
(A) Nystatin (B) Cycloheximide
(C) Aureofungin (D) None of these
17. Virus quantification in a given sample is done
by–
(A) End point efflux (B) End point dilution
(C) End point titration (D) All of these
18. The phenomenon of inhibiting the growth of
bacteria without killing them
(A) Bactericidal (B)
Bacteriostatic
(C) Both (D) None
19. In gram staining the alcohol acts on–
(A) Teichoic acids (B) Peptidoglycan
(C) Periplasm (D) Membrane lipids
20. In cocoa fermentation, the microbial inoclumn
used is of–
(A) Aspergillus niger (B) Candida Krusei
(C) Rhizopus oryzae (D) None of the above
21. Number of the chromosome in bacteria is–
(A) 0 (B) 1
(C) 2 (D) Many
22. Fungi used for bioassay of biotin–
(A) Neurospora (B) Yeast
(C) Aspergillus (D) Penicillium
23. An agent which frees from infection by killing
the vegetative cells of microorganism–
(A) Surfactant (B) Disinfectant
(C) Antiseptic (D) None of these
24. A fluorescent dye used in fluorescent
microscopy is–
(A) Acridine orange (B) Phosphotungstic acid
(C) Ethidium bromide (D) Luciferin
25. Bacteria are commonly seen in soils such as–
(A) acidic (B)
neutral
(C) alkaline (D) saline
26. Protein coat of a virus–
(A) Capsule (B)
Capsid
(C) Envelope (D) Coat
27. 'P' solubilizing bacteria–
(A) Bacillus
megatherium (B) Clostridium
pasteurianum
(C) A. Niger (D) Micrococcus sp
28. In autoclave which form of heat is used ?
(A) dry heat (B) moist heat
(C) vacuum heat (D) both a and-b
29. Virus - "Contangium viuum fluidum"
was given by–
(A) A. Mayer (B)
Beijerinck
(C) Iwanoski (D) None of these
30. Principal sites for CO2 fixation in
autotrophic prokaryotes–
(A) Chromosomes (B)
Carboxysomes
(C) Both (D) None of these
31. Number of flagella in Cyanobacteria are–
(A) Zero (B) One
(C) Two (D) Three
32. Father of bacteriology is–
(A) Leewenhoek (B) Pasteur
(C) Koch (D) None of these
33. Test organism for phenol coefficient–
(A) Salmonella tyagi (B) Staphylococcus aureus
(C) Both(D) None of these
34. Which of the following does not produce any
enzyme?
(A) Amoeba (B)
Virus
(C) Bacteria (D) Fungi
35. In Archaebacteria which one is present in the
cell wall ?
(A) Murein (B)
Pseudomurein
(C) Both (D) None of these
36. A virus that may not destroy the host–
(A) Virulent phage (B) Temperature phage
(C) Cyanophage (D) Lytic cycle
37. Fermenting organism involved in Yoghurt
(A) Streptococcus (B) Aspergillus
(C) Podiococcus (D) None of these
38. An aminoglycoside antibiotic–
(A) Penicillin (B) Streptomycin
(C) Tetracycline (D) None of these
39. Type of relationship between Acetobacter
diazotrophicus and sugarcane is–
(A) Symbiotic (B) Associative
(C) Endophytic (D) Free living
40. Red pigment produced by–
(A) Serratia (B) Micrococcus
(C) Both (D) None of these
41. Rhizosphere was coined by–
(A) Hiltner (B) Beijernick
(C) Winogradsky (D) None
42. Test organism for pasteurization is–
(A) Coxicella bumetti (B) Clostridium pasteurizanum
(C) Bacillus subtilis (D) Bacillus
steareothermophillus
43. Gram staining was discovered by Gram in the
year–
(A) 1762 (B) 1932
(C) 1884 (D) 1890
44. Example of pleomorphic bacteria is–
(A) Acetobacter (B) Azotobacter
(C) Achromobacter (D)
Arthrobacter
45. Acid fast staining used for which bacteria–
(A) Mycobacterium (B) Rhizobium
(C) Bacillus sp. (D) Clostridium
46. Bacitracin is produced by–
(A) Bacillus subtillis (B) Aspergillus niger
(C) E. Coli (D) Yeast
47. Name of the bacterium producing endospore is–
(A) Bacillus (B) Agrobacterium
(C) Xanthomonas (D) E. Coli
48. Ultraviolet light is most germicidal at the
wavelength of–
(A) 245 nm (B) 255 nm
(C) 265 nm (D) None
49. Phosphorus solubilizing microorganism–
(A) VAM (B) Mucor
(C) Rhizopus (D) E. Coli
50. Which of the following genera is most likely
to contain organisms capable of surviving high temperature?
(A) Oostridium (B) Penicillium
(C) Torula (D) Pseudomonas