BOTANY
Paper II

I D-VSF-L-OBB I
I Time Allowed: Three Hours j I Maximum Marks: 200 I
INSTRUCTIONS
Candidates should attempt questions 1 and 5
which are. co,;zpulsOJy, and any THREE of the
remaining questions, selecting at least ONE
question from each Section.
All questions carry equal marks.
Marks allotted to parts of a question are
. indicated against each. . ·
Answers must be writren in ENGLISH only.
Suitable diagrams may be drawn, wherever
required.
(Contd.)


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Section •
1. Write short notes on any four of the
in not more than 150 words each
following
10x4=40
(a)CDK and progression of M-phase
(b)Translocation heterozygotes
(c)Evidence for bidirectional replication of DNA
Golden rice
Pearson's correlation coefficient
2.(a)Describe the chemical organization of
biomembranes, Discuss the functions of their
constituents. 20
(b)Discuss the role of autopolyploidy in evolution
and crop improvement. 20

3.(a)Describe the chromosomal basis of sex
determination in different organisms. 20
(b)Discuss the changes the newly synthesized
RNA undergoes before translation in
eukaryotes. 20

4.(a)What are the advantages of micropropagation
over the conventional methods of clonal
propagation of plants 20
(b)What is cytoplasmic male sterility? Discuss
its importance in the improvement of crops. 20

Section
5. Write short notes on any four of the following
in not more than 150 words each 10x4=40
Stomatal movement
Photosystem II
Secondary metabolites .
Role of ABA in seed maturation
Renewable resources of energy
Illustrate the biochemical steps in the process
of nitrogen fixation. Mention at least two
special structures associated with nitrogen
fixation in different organisms. 20
(b)Describe the metabolic details of CO2 fixation
in CAM plants. 20
7.(a)Discuss the chemiosmotic theory of ATP synthesis. Mention the net gain of ATP
molecules from the breakdown of one glucose molecule. 20
(b)Describe the role parthenocarpy.

8.(a)Describe the biotic and abiotic components of
a biome. 20
(b)Discuss the national and international efforts
towards protection and preservation of
biodiversity. 20