Time allowed: three hours
Maximum Marks: 200
SECTION A
1.
write short notes on any four of the following
in about 150 words each:
(a)
Non- green plastids
(b)
Stages of cell cycle
(c)
Y-chromosome
(d)
Darwinism
(e)
Correlation
2.
(a) with suitable sketches, distinguish between
the major types of cell surface receptors
(b)Explain in detail the
structure of G protein and its role in signal transduction.
3.
(a) Discuss the principles of the double-helix
structure of DNA proposed by Watson and Crick, and compare with that of ‘Z-
DNA’.
(b) Explain different types of DNA replication in
prokaryotes.
4.
(a) Evaluate the different gene transfer
techniques for the production of transgenic plants.
(b)
Enumerate
the types of selectable marker genes employed in developing transgenic plants.
SECTION
B
5.
Write short notes ne any four of the following
in about 150 words each:
(a)
Hydroponics
(b)
Nitrogenase
(c)
Dormancy
(d)
Endemism
(e)
Xerosere
6.
(a) Describe the biochemical process by which
two molecules of ATP are produced from one molecule of glucose. Mention the
names of the participating enzymes.
(b) Discuss the role of mitochondrion for Pyruvic
acid oxidation.
7.
(a) What
are the physiological changes associated with plant senescence? Add a note on
senescence – retarding hormones.
(b) Enumerate the
ethylene-induced responses n plants. What are the commercial used of ethylene?
8.
(a) discuss the causes and consequences of
global warming
(b) What is the significance
of ozone layer? What are the contributing factors for its depletion and what
can be the possible consequences?
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