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Gauhati University Question Papers for Botany 4th Semester Pass Course

Gauhati University Question Papers for Botany 4th Semester Pass Course

Question Paper from 2010 available   

        

More than 50 question papers every semester

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Year
Paper 101
2011
2012
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More than 50 question papers every semester


Paper: E 401 (Theory)

(Plant Physiology and Biochemistry)



UNIT I: Plant water relations: Plant-water relations: Different bio-physio- Chemical phenomenon: definition, phenomenon and Importance of permeability, diffusion, osmosis, Plasmolysis, imbibition, Absorption of water-Introduction, mechanism of water absorption (Active and passive theories), Ascent of sap: Definition, mechanism- (root pressure theory, capillarity, Imbibitional and transpiration pull theories), Transpiration: Definition,  types,  structure  of  stomata.  Mechanism  of  opening  and
closing of stomata (Starch- sugar, K

(Potassium ion) pump theory) 


UNIT II: Mineral nutrition: Essential macro and micro elements and their role in plants (deficiency, symptoms, disease and functions), Translocation of organic solutes: Introduction, direction of translocation, Mechanism: Mass flow or munch hypothesis, protoplasmic streaming theory


UNIT III: Plant metabolism: Photosynthesis: introduction, Ultra structure of chloroplast, photosynthetic pigments, concepts of two Photo systems, Light phase: cyclic and non cyclic photophoshorylation (z- scheme), Dark phase: calvin cycle (C3) Hatch and Slack cycle (C4) and crassulacean acid metabolism, significance of photosynthesis, Respiration: Intorduction, Types of respiration - Aerobic: Glycolysis, TCA cycle ETS (Oxidative phosphorylation) respiration


UNIT IV: Growth and Development: Growth and growth hormones: Phases of growth, factors affecting growth, Plant growth substances, hormones and their Practical applications; Seed dormancy: Introduction, methods 

of breaking Seed Dormancy, factors affecting seed dormancy; Physiology of flowering: Photoperiodism (LD/SD/DN plants) Vernalization and Devernalization; Plants movements: Classification of movements,   Movements   of   curvature.   Movements   of   variation (paratonic –nastic)


UNIT V: Biochemistry: Elementary biochemistry: Introduction, different organic constituents of the cell, Functions of carbohydrates (mono /oligo / polysaccharides) starch, Cellulose, Hemicellulose, proteins and nucleic acids, lipid, alkaloids, gums, mucilage and organic acids; Nitrogen metabolism: Introduction, physical and biological nitrogen fixation, nitrogen in soil, ammonification and nitrification, denitrification; Enzymes: Introduction, nomenclature and classification, mechanism and mode of action. Concept of holoenzymes, apoenzymes, coenzymes and cofactors.


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