Agriculture Microbiology MCQ tribhuvan University 10

91. lignin percentage of plant material is
a. 2-5% b. 5-10% c. 15-25% d. 5-30%
92. in plant phosphorus is found in the form of
a. phytin b. phosphorylated sugars c. phospholipid d. all of the above
93. most common cellulose fermenter in nature are the member of ……..
a. clostridium b. azotobacter c. Frankia d. fusarium
94. Normal C:N ration in humus is
a. 10:1 b.1:10 c 10:4 d. 10:3
95. rice husk is least degradable type of solid waste because of
a. high C:N ratio b. low C:N ratio c. lack of water d. due to lignin
96. the carbon and nitrogen content of humus is respectively
a. 60% ,3-6% b. 40%, 5% c. 20%, 1% d. 15%, 25%
97. Phytoalexins are
a. antimicrobial substances b.synthesized denovo by the plants c.both of the above d none
98. which of the follwings are examples of mutalism……..
a. Lichens b. Endosymbionts c. Mycorrhizae d. all of the above
99. ……is a bacteria which is a parasite of other bacteria
a. bdevellovibrio b. Rickesttsiae c. Bateriophage d. Viruses
100. which organism prefer dry condition
a. Actinomycetes b. fungi c. bacteria d. protozoa