Time Allowed: Three
Hours maximum marks: 200
Candidates should attempt Questions 1 and 5 which are
compulsory and any THREE of the remaining question 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)
Active and Passive transport across cell
membrane
(b)
Radiation and Chemical mutagenesis
(c)
Sympatric and Allopatric speciations
(d)
Missense and Nonsense mutations
(e)
Mitochondria and Chloroplasts
2.
Explain in details, with suitable diagrams the
process of meiotic cell division with reference to a cell with 2 N=4. Give
biological significance of meiosis.
3.
What is a person? Explain the structure and
regulation of the lactose operon.
4.
Write notes on the following:
(a)
Haldane – Oparin hypothesis on origin of life
(b)
Evolution of elephant
(c)
Five kingdom classification and its basis.
(d)
Hardy –Weinberg law- its proof and applications.
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