IAS Mains Botany Paper 2014

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Paper-I

Section –A

Q.1 Briefly describe the following in not more than 150 words each :

  1. Role of fungi in agriculture and medicine.

  2. Fructifications in Fungi.

  3. Reproductory organs in Chara.

  4. Plant quarantine.

  5. Energy plantations.

Q.2

  1. With the help of suitable diagrams describe the evolution of sporophyte in Bryophytes.

  2. Give an account of pigments in Algae.

  3. Discuss about the physiology of parasitism.

Q.3 Draw well labelled diagrams of the following :

  1. Male thallus with antheridiophore of Marchantia.

  2. V.L.S of Marsilea sporocarp.

  3. V.S. of sporophyte of Polysiphonis.

  4. V.S. of apothecium of Peziza.

Q.4 Give the causal organism, symptoms and contol measures of the following :

  1. Tikka disease of groundnut.

  2. Citrus Canker.

  3. Rust of wheat.

  4. Ergot of Rye.

Section –B

Q.5 Describe the following in about 150 words each :

  1. Formation of petrifaction.

  2. Relevance of numerical taxonomy.

  3. Position of monocots in APG classification.

  4. Embryo development in Arabidopsis.

  5. Importance of typification in plant nomenclature.

Q.6 Draw well-labelled diagrams of the following :

  1. Cone of Cycadeoidea.

  2. T.S. of cyathium of Euphorbia.

  3. T.S. of coralloid root of Cycas.

  4. V.S. of leaf of Welwitschia.

Q.7 Write an account of the floral structure of the following families. Give the botanical names of three important plant species belonging to each of the three families and specify their uses :

  1. Orchidaceae

  2. Magnoliaceae

  3. Asteraceae

  4. Rubiaceae

Q.8

  1. Discuss the role of tissue culture in crop improvement.

  2. How are plant protoplasts isolated and fused ?

  3. Describe in detail Hutchinson’s system of classification and compare it with the classification system of Engler and Prantl.

Paper-II

Section –A

Q.1Giving reasons explain the following :

  1. In what way does Mendel’s law of inheritance (dominance ) differ from incomplete dominance ?

  2. Selection of cytoplasmic-genetic male sterility in the development of hybrid varieties

  3. Use of FISH technique in tracking the target organisms

  4. Application of radiomimetic chemicals

  5. Tests of significance in biology

Q.2

  1. Why do chromosomal aberrations happen ?

  2. What are molecular probes ? Mention their application in biology.

  3. How would you develop improved variety of basmati rice for organic farming conditions ?

Q.3

  1. When the glucose-grown cells of ‘E. Coli’ are transferred to the medium containing lactose, what will be the fate of ‘Lac Operon’?

  2. What do you understand by the ‘cell cycle’ ? Mention the important proteins that control the cell cycle.

  3. What makes the ribosomal RNA gene (rRNA) suitable for phylogenetic studies ?

Q.4

  1. Briefly describe the various types of chromosomal aberrations.

  2. Give an experimental evidence to demonstrate that DNA is the genetic material.

  3. Describe in detail the structure and chemical composition of ribosomes.

Section –B

Q.5 Explain the following :

  1. Apical dominance

  2. IUCN classification of extinction risks

  3. Biological species concept

  4. Zinc deficiency in crop plants

  5. Mechanism of drought resistance

Q.6

  1. What is seed germination ? Define normal and abnormal seedlings.

  2. Describe the roles played by mesophyll cells and bundle sheath cells in pathway of fixation.

  3. Define ‘biodiversity’ and discuss the measures to conserve it.

Q.7

  1. Describe the role of national and international organizations established for germplasm conservation.

  2. Explain how proton-motive force drives the synthesis of ATP.

  3. Give a brief note on the concept of sustainable development.

Q.8

  1. Explain how air and water pollution affect the agro-ecosystems.

  2. What are ‘symplasmids’ ? Mention their role in root nodulation and – fixation in the leguminous plants.

  3. Does the process of nitrification synthesize ATP, and how is this energy conserved ?

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