Language Acquisition Beliefs ELD/506 September 23‚ 2013 Wendy Sottile Primary and Secondary Language Acquisition Although much lip service is paid to honoring and validating the mother-tongue of English language leaners‚ the fact remains that if the children of immigrants fail to learn to read and write fluent English quickly (usually within four or five short years)‚ they are destined to populate lower-level classes. In addition‚ should they be lucky enough to graduate from high school
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There are different types of proteins. Fibrous proteins‚ for example‚ can be correlated with structure. Keratin is the main component of hair and nails that form protofibrils and consist of two pairs of alpha helices that are twisted together in a left-hand coil. The flexibility of keratin decreases as disulfide bond cross-links between protofibrils increases. Keratin is also found in skin and wool. Silk fibroin has the ability to form flexible‚ but the inextensive fibers are of great strength
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The purpose of this lab was to use a spectrophotometer to find the concentrations of glucose in varying samples of Gatorade. The varying executions included changing the temperature of reaction (room temperature instead of 40 degrees centigrade)‚ changing the time for reaction (20 minutes in the water instead of 45 minutes)‚ and changing the amount of enzyme added (0.1mL of enzyme. The results in from this lab gave data points with respect to ferricyanide. Fortunately‚ ferricyancide and glucose have
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and dietary fibers. For some reason‚ I never knew that sugar was part of carbohydrates‚ I thought that it was a part of fat. Anyways‚ something new that I learned that carbohydrates is divided into two categories: simple‚ monosaccharides and disaccharides; and complex‚ polysaccharides. One thing that I do recall on carbohydrates back when I took a health class‚ that carbohydrates contain 4 calories per gram and are converted into glucose indigestion. But surprising‚ one fact that I found to be very
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1. Draw a diagram of a villus in vertical section. (Total 5 marks) 2. Draw a diagram of the human digestive system. (Total 4 marks) 3. Describe the role of enzymes in the process of digestion of proteins‚ carbohydrates and lipids in humans. (Total 6 marks) 4. Draw a labelled diagram of the digestive system. (Total 5 marks) 5. State the sources‚ substrate‚ product‚ and optimum pH conditions for the enzyme amylase. (Total 4 marks) 6. Describe the role of enzymes in
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Benedict’s test Reducing sugar can reduce Cu2+ into Cu+ and form a bricked-red precipitate (copper(I) oxide) which is insoluble in water. ii) Use of Benedict’s test Benedict’s test can show the presence of reducing sugar (all monosaccharide and disaccharide‚ except sucrose). Add Benedict’s solution into food samples (solution). Then mix them up and put into a water bath for 5 minutes. If reducing sugar is presence‚ there will be bricked-red precipitate. More is that‚ the variation of the color
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chemicals in power and specificity. Salivary amylase is the enzyme produced by the salivary glands. Formerly known as ptyalin‚ It is an enzyme that catalyzes the breakdown of starches (more specifically the breakdown of amylase and amylopectin into disaccharides and trisaccharides). Amylase‚ like other enzymes‚ works as a catalyst. All catalysts are enzymes‚ but not all enzymes are catalysts. A catalyst is a substance that hastens a chemical reaction but does not become part of the end product. Amylase
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colors. Amylase is an enzyme. Enzymes are a type of catalyst‚ and speed up chemical reactions within the body. Amylase specifically speeds up the breaking up of starch into maltose. It takes the long polysaccharide‚ and breaks it into smaller disaccharides‚ called maltose. Maltose is faster‚ and easier for a person’s stomach to break down rather than a whole macromolecule. An enzyme is denatured when it is exposed to a pH or temperature that is not right for the
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In this lab activity students performed an experiment with the use of distilled water and baking soda solutions as control. The experimental controls are accuracy indicators of laboratory results. Thus‚ controls are important in a lab because the observation results are dependent on the controls. The experimental results can be determined to be valid when it is compared with the control solution. The higher the similarity between the results and the control solution‚ the more accurate the investigation
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(((((((((((((((((((((((((((((((((((((((((((((((( CARBOHYDRATES 1. List the three main groups of carbohydrates. (3 points) 2. Play the animation of dehydration synthesis. What two monosaccarides did you start with? What disaccharide was produced? What molecule was synthesized as a bi-product? (3 points) Link:
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