Time
Allowed: Three Hours Maximum
marks: 200
Candidates
should attempt questions 1 and 5 which are compulsory and any THREE of the
remaining questions, selecting at least ONE question from each Section.
SECTION
A
1.
Distinguish between any Four of the following
(each answer may be in about 150 words):
(a)
Exocytosis and endocytosis
(b)
Xy and xo chromosomal basis of sex determination
(c)
Neanderthal man and Ramapithecus
(d)
Geographical and ethological isolation
(e)
Haeckel’s and Whittaker’s principles of
Classification
2.
Explain the process, theories, experimental
proof and enzymes involved in DNA replication.
3.
Describe how the gene I regulated and expressed
in prokaryotes.
4.
Write short notes on the following:
(a)
Role of mimicry in evolution.
(b)
What are fossils and how does fossilization take
place?
(c)
Illustrate with examples the causes of change in
gene frequency.
(d)
How continental drift has affected distribution
of animals?
SECTION - B
5.
Distinguish between any FOUR of the following
(each answer may be in about 150 words):
(a)
Enzymes and Coenzymes.
(b)
Krebs’s TCA cycle and Glycolysis.
(c)
Induction and involution.
(d)
Yolk-sac placenta and chorioallantoic placenta.
(e)
Osmoregulation and thermo regulation.
6.
What are steroid hormones? Describe their
biosynthetic pathway and functions.
7.
Describe the physiology of contraction of
skeletal muscle.
8.
What is fate map? How is it constructed?
Describe the fate map of Chick.
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