Agriculture Microbiology MCQ tribhuvan University 4

31. which of the following is a strict anaerobic bacteria
a. pseudomonas spp b. Bacillus c. E. coli d. Methanogenic bacteria
32. if you want to remove high ammonium content for the river water, which one of the following bacterium will be useful
a. Rhizobium b. E coli c. Pseudomonas d. Nitrobacter
33. Most efficient strains for the oxidation of ammonia to NO2 is
a. Nitrosococcus b. Nitrospira c. Nitrosomonas d. Nitrosolobus
34. which of the follwing two genera do not contain species that fix nitrogen symbiotically.
a. Rhizobium b. Clostridium c. Frankia d. Anabaena
35. Desulphovibrio bacteria are found commonly in ponds;
a. surface of water b. Middle zone c. bottom
36. eutrophication of lakes lead to overgrowth of
a. grasses b. algae and cyanobacteria c. fungi d. none of the above
37. phytoalexins are formed mostly in which part of plant
a. leaf b. fruit c. root d. flower
38. which physical factor promote the microbial population in soil
a. sand b. clay c. silt d. Loam soil
39. which of the following organism is cellulytic actinomycetes
a. Micromonas b. Nocardia c. Streptomyces d. all of the above
40. In the order of abundance which is the commonest genera of actinomyctes in soil.
a. Streptomyces b. Nocardia c. Micromonas d. Actinoplanes