Experiment 9 : The effect of substrate concentration on enzyme activity Objective To find out the relationship between the substrate concentration and the rate of reaction by determining the number of bubbles produce Hydrogen peroxide (H2O2) is a by-product of biochemical metabolism. An accumulation of hydrogen peroxide can be deadly‚ so it has to be decomposed. One of the decomposing factors is an enzyme called Catalase. Catalase breaks hydrogen peroxide into water and oxygen. The chemical
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Properties of Different Bonds An ionic compound forms from a nonmetal and metal element. A covalent compound is formed by two non metal elements. A metallic compound is formed by two metal elements. Metallic compounds have generally high melting points‚ are loose and flexible with their electrons‚ conduct electricity well‚ and have low solubility in water. Ionic compounds are generally crystals‚ have a high melting point‚ and usually have high solubility in water and conduct electricity well when
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Question 1 Electromagnetic radiation behaves both as particles (called photons) and as waves. Wavelength () and frequency () are related according to the equation where is the speed of light (). The energy ( in joules) contained in one quantum of electromagnetic radiation is described by the equation where is Planck’s constant (). Note that frequency has units of inverse seconds ()‚ which are more commonly expressed as hertz (). Part A A microwave oven operates at 2.40 . What is the wavelength
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Decomposition Reaction-Electrolysis of Water Introduction: Demonstrate the decomposition of water in simple but very colorful and dramatic fashion on an overhead projector. Concepts: • Decomposition reaction • Oxidation–reduction • Electrolysis • pH Materials: Sodium Chloride/universal indicator solution‚ NaCl‚ 25 mL Overhead projector Pencil lead‚ 0.7 mm Battery lead with alligator clips Petri dish‚ disposable Battery‚ 9-Volt
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Name: _____________________________ Submit Worksheets for Credit Stereochemistry Workshop 1. Assign the marked asymmetric centers with R or S designations. 2. Rank each of the following sets of substituents (highest priority substituent = 1; lowest priority substituent = 4). Place the number in the blank below the substituent. (a) (b) 3. Determine the relationship between each of the following pairs of structures (enantiomers‚ diastereomers‚ constitutional isomers
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The chemistry of life Cell chemistry is hierarchical Inorganic precursors Small organic molecules Macromolecules Supramolecular structures Organelles/structures Cell BIO 1140 – SLIDE 1 Review of macromolecules Carbohydrates Polymers of monosaccharides (polysaccharides) Energy storage Structural chitin starch glycogen Purple pages F23 cellulose BIO 1140 – SLIDE 2 http://www.mpie.de/index.php?id=2957 Monosaccharides CnH2nOn n = 3 to 7 Trioses‚ pentoses and hexoses
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English literature exam paper – Section A Question 1 • How does the writer present her thoughts and feeling about the struggle for identity? • How far is the extract similar to and different from your wider reading about the struggle for identity in modern literature? You should consider the writers’ choices of form‚ structure and language as well as subject matter. Betty Friedan has started her speech with two rhetorical questions‚ “Am I saying that women have to be liberated from men? That
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Year 9 Biology Notes Keeping Healthy Test * Metabolic Rate- How quickly the chemical reactions (metabolism) are taking place within cells * In a balanced diet‚ you need- -Carbohydrates to build cells and to release energy. -Minerals and Vitamins in small amounts to keep the body functioning. -Water because we lose 70% form sweat‚ breath‚ tears‚ urine‚ faeces etc. -Fibre to prevent constipation and bowel cancer. * Malnutrition- eating a diet which is not balanced which can lead
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Tutorial Part 1 1. (a) (b) Define macroeconomics concept. Discuss TWO (2) macroeconomics goals. The following table shows the national income data for an economy in year 2009 ITEM RM (million) Exports 1000 Personal consumption expenditure 700 Changes in stock -500 Indirect business tax 450 Government expenditure 3000 Investment 2500 Personal income tax 740 Subsidies 300 Imports 2500 Factors income paid abroad 600 Depreciation 255 Factors income received from abroad 570 Based on the above data
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Tariff Cuts in Vietnam The Vietnamese economy began to feel the impact of entry to the World Trade Organization (WTO) in January. Under its WTO commitments‚ Vietnam has begun to cut tariffs on more than 1800 imported items. The cut is quite large for some commodities‚ such as fabrics‚ where the tariff has dropped from 40 % to 12 %. Taking advantage of the lower tariffs‚ businesses have imported a large quantity of foreign goods‚ and the prices of goods at the retail stores have fallen as the
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