Introduction Enzymes are proteins that are involved in all the chemical processes in living things. As they are made of proteins they are affected by pH and temperature. Enzymes are catalysts; they speed up chemical reactions without being changed themselves. Digestive enzymes speed up the breakdown of large food molecules into smaller ones so that the blood can absorb them. Enzymes turn a large starch molecule into thousands of tiny glucose molecules. Enzymes end in ’ase’. There are thousands of
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Evidence of Photosynthesis Photosynthesis is the process during which a plant’s chlorophyll traps light energy and sugars (glucose) are produced. In plants‚ photosynthesis occurs only in cells with chloroplasts. Water (H2O)‚ carbon dioxide (CO2) and light energy are required. The light energy is absorbed by the green pigment‚ chlorophyll‚ and is converted into chemical energy‚ which causes the water drawn from the soil to split into molecules of hydrogen and oxygen. The hydrogen combines with
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SWECO‚ Inc. Case Write-Up SWECO is in the precision machinery industry‚ products include Process Equipments‚ such as separator(sold internationally to many industries)‚ replacement parts and screens‚ grinding mills‚ finishing equipments‚ and centrifugal wastewater concentrator. SWECO’s success factors are: technology lead‚ dominating the fine-screen manufacturing market(other suppliers cannot provide with the same high quality); Good reputation‚ with many existing customers worldwide; follow-on
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Introduction: Photosynthesis is the trapping of carbon dioxide and its subsequent reduction to carbohydrate‚ using hydrogen from water. Hexose sugars and starch are commonly formed so the following equation is often used: light energy 6CO2 + 6H2O C6H12O6 + 6O2 carbon dioxide water chlorophyll carbohydrate oxygen Photosynthesis consists of two stages: These are the light-dependent reactions‚ for which light energy is necessary‚ and the light independent reactions series of light-dependent reactions
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To Investigate the Effect of Varying pH on the Rate of a Reaction Catalysed by Trypsin Aims I hope to determine the effect of varying pH on the rate of reaction catalysed/controlled by the enzyme trypsin. Method 1. Add 4cm³ of the 2% trypsin solution in to 6 test tubes labelled A-F 2. Add 4cm³ of the appropriate buffer solution to each. ( I will be testing pH 4‚5‚7‚8‚8.8 and 10) 3. Add 4cm³ of distilled water and 4cm³ of the appropriate buffer solution to 6 control test tubes labelled CA-CF to see
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Plants contain many pigments in different proportions. For flowering plants it’s mostly a combination of chlorophyll-A‚ chlorophyll-B‚ pheophytin and Carotenes. These pigments have shades of green‚ blue green‚ grayish‚ and yellow-orange. Their concentration is different for different species and also depends on the time of year. Also‚ these pigments have different solubility in different solvents. Extracted pigments could be used in another project‚ such as chromatography. Attention! This method
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Abstract The purpose of this experiment was to identify whether density is an extensive or intensive physical property. By using water displacement‚ the volumes of the paper clip samples were measured and the masses were obtained by using an electronic balance. Each mass and volume was unique to their sample so by using their values‚ density was used to identify substances in the lab. After conducting the experiment‚ the results showed that there was a positive slope between the different paper
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higher concentration to those of lower concentration‚ until there is an even concentration. This movement is random because it is a result of kinetic energy. Diffusion is a slow process‚ but there are many factors that will affect it’s rate. The rate of diffusion will vary depending on the size of the particle. For example‚ a smaller particle will move faster than a large molecule at a given temperature . During reactions‚ when there is more energy‚ the reaction will take place at a faster rate. An
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Osmosis investigation Aim: To investigate how sugar concentration affects the mass or size of a potato and find out the sugar solution. Introduction: Osmosis is the movement of water molecules across a partially permeable membrane form a region of high water concentration to a region of low water concentration until the concentration on both sides is equal. This means that osmosis is like diffusion involving water molecules. Osmosis occurs across a partially permeable membrane‚ with holes
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a. The beak size of 12 mm is relatively shallow compared to the available range from 10 mm to 30 mm. b. The shallow beak size of 12 mm is not suited for the hard seeds that are available because of the low rainfall of 20 cm. 3. The beak size went up on the islands as time progressed because only hard seeds were available to the finches. Therefore the average beak size increased over time because the trait of larger more deep beaks were more suitable for survival in the given environment. As more
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