Papers : IFS - Indian Forest Service Botany Previous Year Paper (II) (2003)

PAPER -II : SECTION A

1. Write short notes on any four of the following in about 150 words each
(a) Cell fractionation (10)
(b) MPF (10)
(c) Pseudoallelism (10)
(d) Nucleolus (10)
(e) Importance of apomixis in plant breeding (10)

2. (a) Enumerate various techniques used or gene mapping.
(b) ‘Recombination and independent assortment are dependent on the positions that the genes occupy.’ Justify this statement. (30)

3. (a) What are transgenics and how do they differ from recombinants? (5)
(b) What is Bt cotton? (5)
(c) Discuss the pros and cons of the use of transgenic crops. (30)

4. (a) What was the impact of the discovery of sex chromosomes on genetics? (15)
(b) What is the balance concept of sex determination and how was this established? (25)

SECTION B
5. Write short notes on any four of the following in about 150 words each:
(a) Coenzvmes (10)
(b) Fermentation (10)
(c) Air pollution (10)
(d) Global warning (10)
(e) Vernalization (10)

6. (a) Describe stepwise various reactions involved in the process of photosynthesis. (30)
(b) Draw a well-labelled diagram of a chloroplast as seen under an electron microscope. (10)

 7. (a) Describe the importance of studying stress physiology of plants growing under adverse conditions. (20)
(b) Describe the molecular basis of fruit ripening. How has our understanding of this process helped in fruit marketing? (15 + 5)

8. (a) Discuss the causes and consequences of water pollution. (20)
(b) What is meant by biodiversity and how can it be conserved? (10)
(b) Enumerate various forest types of India. (10)