Time allowed: Three
Hours maximum marks: 200
Candidates should attempt questions 1 and 5 which are
compulsory, and any THREE of the following questions selecting at least ONE
question from each section.
SECTION A
1.
Write short notes on any four of the following
in about 150 words each:
(a)
Nucleosome
(b)
Male sterility
(c)
Chi-square test
(d)
Trisomics
(e)
One-gene, one- enzyme concept
2.
(a) Explain the various methods of transfer of
genes.
(b) What is recombinant DNA
technology? How is it employed in genetic engineering?
3.
(a) With
suitable classical experiments on sex-linked inheritance, prove that genes are
carried on the chromosomes.
(b) How is sex determined in plants?
4.
(a) Explain the regulatory mechanism of gene
action in microbes.
(b) What is genetic code? Explain the echanism of genetic code in the
transfer of information from DNA to amino acids.
SECTION – B
5.
Write short notes on any four of the following
in about 150 words each:
(a)
CAM pathway
(b)
Phytochrome
(c)
Gibberellins
(d)
Bioindicators
(e)
Red Data Books
6.
(a) Describe the morphological and biochemical
changes accompanying seed germination.
(b) Explain the molecular basis of
fruit ripening and show how fruit ripening is manipulated.
7.
(a) Explain the physiology of nitrogen
metabolism.
(b) Explain the mechanism of photorespiration in plants.
8.
(a) Explain the characteristics of various
forest types of India.
(b) Explain forests as renewable resources.
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