8. SOCIAL SCIENCE Code No. 087 Class-IX Summative Assessment- II March - 2011 Design of Question paper TIME : 3 Hrs 1. WEIGHTAGE TO FORM OF QUESTIONS Form of Questions 1. 2. 3. 4. M.C.Qs. Short Answer (S.A.) Long Answer (L.A.) Map Question Total 2. Marks of Each Question 1 3 4 3 Number of Question 16 11 7 1 35 Total Marks 16 33 28 03 80 MM : 80 UNIT-WISE DIVISION OF QUESTIONS Unit No. (Subject) Marks No. of No. of No. of Map Total 1 mark 3 marks 4 marks Question Questions Questions Questions
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The purpose of these experiments was to probe and manipulate the activity of the enzyme peroxidase by varying temperature‚ pH‚ the amount of enzyme compared to the substrate and the effect of hydroxylamine. Peroxidase activity is expressed when the potato extract is subjected to stresses such as low temperature (El-hilali et al.‚ 2012). The most eye catching factors that we tested for their impact on enzyme activity involved change in pH‚ temperature‚ boiling extract‚ and the effects of probing the
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methanol and filtered through 0.45 µm filter. The filtrate thus obtained constituted the test sample. In the third method (Method 3)[13]‚ 20 g of freeze dried material was extracted using 200 ml methanol in a cold room (10°) overnight and the homogenate was centrifuged at 1252 × g for 5 min. The methanolic extract was evaporated to dryness and then the residues redissolved in 50 ml water. The aqueous extract was then centrifuged at 7826 × g for 5 min. The supernatant was first partitioned twice
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Appendix D Additional problems D.1 Probability theory (Chapter 2-3) (i) If X is a uniform‚ continuous random variable on the interval [a‚ b] and Y is a uniform‚ discrete random variable on the interval [k‚ l] where k and l are integers and k < l‚ then compute Pr [Z ≤ x] where Z = X + Y given that X and Y are independent. (ii) Suppose that the number N of pages in a fax transmission has a geometric probability distribution with mean 1/q = 4. The number K of bits per page also has a geometric
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Ainslie‚ George and Nick Haslam (1992b ). ‘‘Hyperbolic Discounting‚’’ in George Loewenstein and Jon Elster‚ eds.‚ Choice Over Time Angeletos‚ George-Marios‚ David Laibson‚ Andrea Repetto‚ Jeremy Tobacman‚ and Stephen Weinberg (2001). ‘‘The Hyperbolic Buffer Stock Model: Calibration‚ Simulation‚ and Empirical Evaluation.’’ Journal of Economic Perspectives‚ 15(3)‚ 47-68. Benabou‚ Roland and Jean Tirole (2002). ‘‘Self-Confidence and Personal Motivation.’’ Quarterly Journal of Economics‚ 117(3)‚ 871-915
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hours and then placed in nutrient agar covered with Staphylococcus epidermis (gram positive) bacteria for 24 hours (in an incubator)‚ garlic will have the strongest antimicrobial effect. This is because of allicin (an active principle of garlic homogenates)‚ which has a chemical reaction with thiol groups of enzymes in the bacteria. Ginger will have the least antimicrobial effect. This is because there are not as many chemical reactions with enzymes in the bacteria. Risks: The risks of using Staphylococcus
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Francis J.‚ Janzen‚ H. Henry Olson‚ Barry M. Olson‚ Andrew F. (2009) Erosion productivity soil amendment relationships for wheat over 16 years. Soil & Tillage Research. Vol. 103 Issue 1‚ p73-83. 4. Fiener‚ P.‚ Auerswald‚ K. (2007) Rotation Effects of Potato‚ Maize‚ and Winter Wheat on Soil Erosion by Water. Soil Science Society of America Journal. Vol. 71 Issue 6‚ p1919-1925. 5. Overman‚ Allen R.‚ Wilkinson‚ Stanley R. (2003) Extended logistic model of forage grass response to applied nitrogen as affected
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Chapter 3 Centrifugation Biochemistry and Molecular Biology (BMB) 3.1 Introduction 3.2 Basic Principle of sedimentation 3.3 Types‚ care and safety of centrifuges 3.4 Preparative centrifugation 3.5 Analytical centrifugation Analytical Biochemistry (AB) 3.4.3 Ultracentrifugation Koolman‚ Color Atlas of Biochemistry‚ 2nd edition 1 General Steps in Biochemical Separation 2 Separation of Macromolecules Chromatography‚ precipitation Electrophoresis‚ ultracentrifugation 3
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B.Sc. First Year Semester – I Paper I .Fundamentals of Microbiology Credit - 1 1 Scope & relevance of Microbiology i) ii) iii) Definition & concepts Types of microorganism Distribution of microorganisms in nature 2. Development of Microbiology as a Scientific Discipline 1.1 History i) ii) iii) iv) v) vi) Credit – 2 Early observation of microorganisms Spontaneous generation conflict : Contribution of scientists Recognition of the microbial role in diseases. Koch’s postulates Recognition of microbial
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Factors affecting the rate of catalase activity The extent at which environmental factors affect the rate of catalase activity was discovered in this lab. The assay system‚ in which a filter paper disc was dipped into the enzyme and submerged using a stirring rod in a test tube filled with 20mL of hydrogen peroxide‚ was used to test several enzyme factors. As the saturation of hydrogen peroxide increased the rate of reaction increased as well. When the enzyme concentration increased the rate
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