Introduction: A chemical reaction involves the breaking and forming of bonds in order to create the necessary energy required to cause movement. Each reaction is catalyzed (an increase in rate because of a present catalyst) by a specific enzyme. Enzymes are able to denature proteins‚ meaning that a protein loses its original shape by uncoiling‚ giving it a random‚ unstructured shape. The pineapple plant contains bromelain which‚ because of its unique characteristics‚ keeps gelatin from thickening
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simple soluble substances. There are two types of digestion – chemical digestion and mechanical digestion. Mechanical digestion involves breaking up large pieces of food into smaller pieces. This provides a large surface area for the action of enzymes on food. There is no change to the chemical composition of food during mechanical digestion. Mechanical digestion occurs in the mouth (mastication) and in the stomach (churning). Chemical digestion involves the action of enzymes. Large insoluble food
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Lab Report 8 April 15th Exercise 8: Chemical and Physical Processes of Digestion Lab Report Questions Activity 1 What is the difference between the IKI assay and Benedict’s assay? IKI assay detects the presence of starch‚ and the Benedict assay tests for the presence of reducing sugars as well as IKI turns blue black whereas Benedict is a bright blue that changes to green to orange to reddish brown with increasing levels of maltose What was the purpose of tubes #1 and #2? Why are they
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Abstract The “Chemical Kinetics” experiment was done to investigate the changes in the rate of reaction under the effect of concentration‚ temperature‚ and presence of a catalyst. It was determined that as the concentration of reactants and the temperature increases‚ the rate of the reaction increases as well. Also‚ the reaction was run by the presence of catalyst‚ and the rate of the reaction increased drastically in the presence of it. The order of the reaction with respect to each reactant
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Physiology & Anatomy Lab SC 145L Anatomy & Physiology I Lab Chemical and Physical Processes of Digestion Introduction: In this lab‚ we will see how different chemical processes occur as we observe how different enzymes digest different substrates and produce subunits. Key Terms: (found in bold in Lab Manual) Please define all bold terms in your own words: Enzymes- Large protein molecules made by your body cells. Catalyst- Without becoming part of the substance it will change the rate of the
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Life Stages I will be explaining the physical and psychological changes which may be associated with ageing. Physical changes – skin‚ bones and joints * Skin becomes more wrinkled‚ thinner and less elastic. * Bones are less dense and are more likely to suffer from minor or serve injuries. * Joints stiffen and can be more painful as the bones thin out. * Muscles become weakened and loosen. * The spine may round which leads to hunched backs and other spine conditions. Senses:
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answer is that a pregnant woman’s body is always changing. When this is said‚ many think of the physical changes that one can see or feel. However‚ even though these physical changes are important‚ the true question is what causes these physical changes? Physical changes to a pregnant women’s body are the result of physiological changes. What is a physiological change? To understand what this kind of change is‚ the term physiology must be understood. Physiology is “the branch of biology dealing with
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Lata Mangeshkar- The Pride of India India‚ one of the highest movie producing countries‚ has many great singers. One such singer‚ who has been singing for the past 60 years is non other then my favourite singer Lata Mangeshkar. Lata Mangeshkar is and has been the most heard voice in all of India for some time now. Lata has been active in all Indian popular and classical music‚ sung film songs‚ ghazals ‚ bhajans and pop (Nagma‚ 2004). Lata’s mesmerizing melodious voice has won fans all over the
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The progress of the reaction was monitored in my case using two TLC plate. It first started off with the spotting of Standard benzoin and benzil which were provided in the lab and followed by the addition of the reaction mixture at once it starts changing colour/boiling‚ then at 10 and 20 mins into the reflux. Once all the necessary steps were spotted‚ the TLC plate was placed in in a beaker containing CH₂Cl₂(methylene chloride)‚ which was used as the developing solvent in this experiment. To check
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Derricka Joe Period 5 1 Oct.‚ 2014 Lab Experiment One: Physical Properties Lab Analysis: For our first unknown‚ we observed the color and odor of the substance. The substance was a clumpy‚ white‚ crystal-like substance and it smells like new plastic. When we tested the solubility in water it resulted insoluble and in ethanol it resulted soluble. This substance could not be tested for electrical conductivity because the water was insoluble. We then tested for the PH value and it was neutral. The
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