Total No. of Printed Pages—3
1 SEM TDC BOTH (CBCS) C 1
2 0 2 1
( March )
BOTANY
( Core )
Paper : C–1
( Microbiology and Phycology )
Full Marks : 53
Pass Marks : 21
Time : 3 hours
The figures in the margin indicate full marks
for the questions
1. (a) Choose the correct answer of the
following : 1×3=3
(i) Cap cell is a characteristic feature
of Volvox / Oedogonium / Chara /
Nostoc.
(ii) The storage product of Rhodo-
phyceae is starch and oil / cellulose
/ floridean starch / glycogen.
(iii) The life cycle of Chlamydomonas
is diplontic / haplontic / haplo-
diplontic / diplo-haplontic.
16-21/338 ( Turn Over )
( 2 )
(b) Fill in the blanks of the following : 1×2=2
(i) The specific time interval between
one binary fission to the next
binary fission is called _____.
(ii) Pasteurization was discovered by
_____.
2. Write short notes on any three of the
following : 4×3=12
(a) Coenobium of Volvox
(b) Asexual reproduction of algae
(c) The role of bacteria in agriculture
(d) Economic importance of viruses
3. What are the criteria based on which algae
are classified? Give a brief account of the
classification of algae suggested by Fritsch.
3+9=12
Or
Write notes on the following : 6+6=12
(a) Male and female reproductive structure
of Chara
(b) Structure of unilocular and plurilocular
sporangia of Ectocarpus
16-21/338
4. What is genetic recombination? Describe
with diagram the mechanism of conjugation
in bacteria. 3+3+6=12
Or
Write notes on the following : 6+6=12
(a) Characteristic features of bacteria
(b) Nutritional types of bacteria
5. What is capsomere? Discuss the physio-
chemical nature of viruses. Give an example
of plant virus with diagram. 2+6+4=12
Or
Write notes on the following : 4×3=12
(a) Insect transmission of viruses
(b) Function of prions
(c) Morphology of viruses
H H H
16-21—3000/338 1 SEM TDC BOTH (CBCS) C 1
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