Papers : IFS - Indian Forest Service Botany Previous Year Paper (II ) (2007)

PAPER -II : SECTION A

1. Write short notes on any four of the following in about 150 words each:
(a) Lysosomes (10)
(b) Cytoskeleton (10)
(c) Multiple factor inheritance (10)
(d) Prion (10)
(e) Standard deviation(10)

2. (a) With suitable diagrams, explain the structure of chromatin found in interphase nucleus. (20)
(b) Explain how the chromatin is packaged in a metaphase chromosome. (5)
(c) Explain the significance of the condensation/ decondensation cycle of chromatin. (15)

3. (a) Enumerate the salient features of genetic code Flow is it related to evolution ? (20)
(b) Give a detailed account of prokaryotic protein synthesis. (20)

4. (a) What is heterosis ? Explain the genetic basis of heterosis and inbreeding depression. (20)
(b) Write brief notes on different strategies for the improvement of self-pollinated crops. (20)

SECTION B
5. Write short note on any four of the following in about 150 words each:
(a) Anti-transpirants (10)
(b) Charismatic theory (10)
(c) Senescence (10)
(d) Social forestry (10)
(e) Intellectual Property Rights (10)

6. (a) Trace the path of carbon in C3 plants during photosynthesis. (25)
(b) Explain how Hatch and Slack pathway inC4 plants is integrated with Calvin cycle. (15)
(b) Explain the mechanism of flower induction crop plants by vernalisation. (15)

8. (a) Illustrate the energy flow in an aquatic ecosystem. (15)
(b) Give a comparative account on the biomechanical cycling of nitrogen and phosphorus. (25)