ARS (Agricultural Research Scientist) Exam 2006
IARI, New Delhi
Subject: Biotechnology (Agricultural Sciences)
is Molecular Markers? How do they differ from biochemical markers? Discuss
their utility in plant Biotechnology with suitable examples.
all comparisons between the chloroplast genome and the nuclear genome.
Describe the chloroplast transformation method and give its advantages
over the nuclear transformation procedure in plants.
the basic step and mechanism of nitrogen fixation in legumes with special
emphasis on the role of nif genes.
is RNAi? Describe the various mechanism of gene silencing and its
significance in crop improvement.
the detail account of the current status of transgenic crops at global
level and critically view the importance of transgenics in Indian
How is double fertilization accomplished in plants? What is the fate of
the egg and the endosperm nucleus?
(b) How does gamete formation in
higher plants differ from that in higher animals?
(a) What is an
enzyme and how does work?
(b) What are different methods of
enzyme immobilization? Explain their industrial application with advantages.
between forward and reverse genetics, and explain how these approaches are
useful tools for crop improvement.
What are different methods of gene
isolation? Describe the essential steps involved in isolation of R genes how
any plant species the map-based cloning method.
is the promoter? List various promoters with suitable examples in each
case. Describe the currently available methods of isolation of plant
What is microarray technique? Give
the principle on which it is based. What purpose is the technique widely used
for? Describe the procedure in detail with a suitable example.
are QTLs? Explain how they are identified and
used in crop improvement programmes.
What is a genetic linkage map?
Describe the various steps involved in constructing a genetic linkage map in
is photoremediation? How does it differ from
other method of bioremediation? Explain in detail the mode of action of phytoremediation with suitable examples.
Describe the use of microbes for
the production of : (a) Hydrogen, and (b)
Hydrocarbons, as source of energy with associated advantages, if any.