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D 31621 (Pages : 2) पपि या © ०००००००००००००००००००००००००००००००००००००००००

THIRD SEMESTER (CUCBCSS—UG) DEGREE EXAMINATION
NOVEMBER 2022

Microbiology
MBG 3B 03—ENVIRONMENTAL AND SANITATION MICROBIOLOGY
(2018 Admissions only)
Time : Three Hours Maximum : 80 Marks

Wherever needed answers must be supported by structural illustration and diagrams.
Part A
Answer all the twelve questions.
1. Anderson sampler is used for
2. The major source of transmission of COVID-19 is —————.

3. Apartially enclosed coastal body of brackish water with one or more rivers or streams flowing with

a free connection to the open sea is known as ————_
4. The major coliform group present in water is
5. The strength of waste water is expressed in terms of —

6. A type of microbial aggregate which contrasted with biofilms and granules are known as

7. The process by which an entire body of water or its parts becomes progressively enriched with
minerals and nutrients is termed as

8. The method in which the addition of freshly prepared microorganisms into the contaminated soil is

known as
9. Green and purple bacteria are commonly present in —————— zone of aquatic ecosystem.
10. The process of bioleaching is takes place in —————— of microbial cell.

11. The bioleaching process is happened in natural occurrence where aqueous solution of microorganisms
is pumped through drilled passages within the ore is known as ——————_.

12. The major lixiviant used in the indirect leaching of pyrite is —————.

(12 x %= 6 marks)

Turn over

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