UPSC: IAS
MAIN - 2007
ZOOLOGY
Paper- I
Time Allowed: Three
Hours Maximum Marks: 300
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INSTRUCTIONS
Candidates should
attempt all questions strictly in accordance with the instructions given under
each
questions. The
number of marks carried by each question is indicated at the end of the
question.
SECTION A
1.
Write concise account of any three of the following in about 200 words each:
20x3=60
(a) Various types of symmetry found in animal
kingdom, with suitable examples.
(b) Comparison of alimentary canal of frog and rabbit
(c) Torsion in gastropoda
(d) Structure and function of thyroid gland along
with its regulation.
2.
Explain the status of Protista and parazoa giving their characteristics with
suitable example. 60
3.
Explain the metamorphosis in insects and its hormonal
regulation. 60
4.
Draw well labeled diagram of transverse section of mammalian testis and ovary.
Describe the function of
Male and female sex hormones (Testosterone and
estrogen) 60
SECTION B
5.
Write brief account of any three of the following in
about 200 words each: 20x3=60
(a) What is ecological succession? Describe its
process in a pod or lake.
(b) Concept of imprinting
(c) Malaria: its vector, pathogen and prevention
(d) Chi-Square and its importance
6.
What is pollution? Describe water pollution, its
sources and prevention. 60
7.
What is sericulture? Describe the tools and materials required for it. Mention
different types of silk moth and
varieties of silk common in
India. 60
8.
a). What is mean, median and mode? Explain the
relationship between these three measures of central
tendency. 30
b). what is electron microscopy? Mention different
types of electron microscopes and their use in biology. 30
Paper- II
SECTION-A
1.
Different between any three of the following: -
20x3=60
(a) Coincidence and interference
(b) Mitotic and Meiotic Prophase
(c) Substantive and polymorphic variation
(d) Genera and Species
2.
Describe transcription in pro- and eukaryotes. 60
3.
Write explanatory notes on the following: - 30x2=60
a). Mobile Genetic
Segment
b). Tryptophan Opera
4.
Discuss Hardy-Weinberg Law and mention its utility.
60
SECTION-B
5.
Explain the importance of any three of the following:
- 20x3=60
(a). Structure and function of cyclic AMP
(b). Mechanism of Hormone action
(c). Regeneration
(d). Teratogenesis
6.
Discuss active and passive immunity. Mention autoimmune disorders. 60
7.
Describe programmed cell death. 60
8.
Discuss the role of liver and pancreas in digestion? 60
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