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1 No. of Printed Pages : 8 I LSE-05 I BACHELOR OF SCIENCE (B.Sc.) Term-End Examination 0609:3 June, 017 LIFE SCIENCE LSE-05 : PHYSIOLOGY Time : hours Maximum Marks : 50 Note : Use separate answer-sheets for Part I and Part II. Be brief and precise in your answers. Draw neat and labelled diagrams, wherever necessary. PART I Animal Physiology Note : Question no. 1 is compulsory. Attempt any four questions from questions no. to (a) Differentiate between cardiac and smooth muscles. (b) Explain the following : 3x1 =i3 (i) (ii) Wall of the stomach is not digested Myelination increases the rate of transmission of nerve impulse (iii) Need for lung surfactant LSE-05 1 P.T.O.

2 . Briefly explain the sliding-filament theory of muscle contraction Describe the transport of CO in blood with special reference to chloride shift (a) Describe the regulation of kidney function with the help of suitable diagrams. 4 (b) Differentiate between osmoregulators and osmoconformers Explain the estrus cycle of rat. 6. Draw a well labelled diagram of a neuron and describe chemical synaptic transmission. +3=5 7. Write short notes on any two of the following : x =5 (a) (b) (c) (d) Pheromones Clotting Mechanism Asexual Reproduction Non-Shivering Thermogenesis LSE-05

3 PART II Plant Physiology Note : Question no. 8 is compulsory. Attempt any four questions from questions no. 9 to (a) Fill in the blanks in the following statements : 4x1=4 (i) The process of is the driving force for the upliftment of water in tall trees. (ii) The process of synthesis of ATP during photosynthesis is called (iii) Synthesis of amylase in germinating cereal grains is induced by the hormone (iv) Assimilation of in plants is primarily done by glutamine synthetase. (b) Choose the correct option : x1 =1 (i) The light of different wavelengths absorbed by extract of plant pigments is called (absorption spectrum/action spectrum). (ii) Zinc deficiency affects (protein metabolism/fat metabolism). LSE-05 3 P.T.O.

4 9. Write short notes on any two of the following : x (a) (b) (c) (d) Phloem Loading Leghaemoglobin Vernalisation Water Potential 10. (a) List any four growth processes controlled by phytochrome. (b) What is water stress? Discuss its harmful effects on crop plants (a) Discuss Rhizobium-legume symbiosis in plants. (b) Name any two macronutrients. Give any one function of each (a) Describe the role of K+ in the mechanism of stomatal opening. (b) Discuss the important uses of auxins in agriculture and horticulture. 13. (a) Draw a scheme of electron transport in the light reaction of photosynthesis. (b) Explain 'red drop' in photosynthesis. LSE-05

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8 9. 1a+-irc1R d : xi () *47 ititur (ii) (ii) 10 etku I f4ita )1qast> Azad' 4.11 i (ii) WO' Y4T4 A: 4T? 14( 4t1 *Ng ('i) *4 4 ti49atiii-tb d1 * 'f -4tNg f43;41 Teo *11w-ai * MIT Gial I 5Act) ch.ii"rw mcniti laiw 1 1. () tgo4 41 &AI 4 K+* itrwr aufq *1:4 (s) t-rf afft deill-tri 4 mlitral *NR 13. M 51cm41- qui *1' mchkilq atfirfo(r trit-4-e 14=t4 wr aft ta-ilw I (ii) mchiri-tikt)qui 4 "kg i" tvisilw LSE ,500