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‎FOURTH SEMESTER (CBCSS—UG) DEGREE EXAMINATION
APRIL 2023
Microbiology

Time:

7

7

10.
1.
12.
13.
14.

15.

MBG 4B 04—SOIL AND AGRICULTURAL MICROBIOLOGY
(2019 Admission onwards)
Two Hours and a Half Maximum : 80 Marks
Part A

All questions can be attended. Each question carries 2 marks.

Maximum Ceiling 25.
Rhizosphere.
Frankia.
PGPR.
Advantages of Mycorrhiza.
Any two examples for associative nitrogen fixers.
Crown gall.
Any two examples for fungi used as bio control agents.
Denitrification.
Define microbial inoculants.
What is commensalism ?
Anabaena
Symptoms of citrus canker.
Write any two examples for viral plant pathogens.
What are the importance of Azospirillum ?

41151118.

Turn over

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