Extracting DNA from Fruits How Cross-linking Changes the Properties of a Polymer Integrated Science Sample SBA Task Practical Related Task – C1 Osmosis in Living Tissue Student Handout (Version 1) Purpose To determine the water potential of potato tissue. Background When two solutions with different concentrations are separated by a selectively permeable membrane‚ osmosis takes place. Water will pass from the side with higher water potential to the side with lower water potential. When a plant
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Introduction This practical experiment was performed in an attempt to observe how enzymes (starch phosphorylase in particular) are affected by varying its temperature before introducing it to the substrate it will be reacting with. A catalyst (enzyme) is a substance that changes the rate of a reaction; for a reaction to take place at all‚ the enzyme must first come into contact with the substrate. Enzymes are subject to a number of factors which effect how fast they can cause a reaction with a substrate;
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DIFFUSION= The movement of atoms or molecules from an area of higher concentration to an area of lower concentration. Atoms and small molecules can move across a cell membrane by diffusion. OSMOSIS= Diffusion of fluid through a semipermeable membrane from a solution with a low solute concentration to a solution with a higher solute concentration until there is an equal concentration of fluid on both sides of the membrane. SELECTIVE PERMEABLE MEMBRANE=a membrane (as a cell membrane) that allows
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protein[1]. Catalysts speed up chemical reactions and can go without being used up or changed [3] Without enzymes‚ the biochemical reactions that take place will react too slowly to keep up with the metabolic needs and the life functions of organisms. Catecholase is a reaction between oxygen and catechol [2]. In the presence of oxygen‚ the removal of two hydrogen atoms oxidizes the compound catechol‚ as a result of the formation of water [2]. Oxygen is reduced by the addition of two hydrogen atoms‚ which
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= 19.667 mL The molarity of NaCl solution = MNaCl = MAgNO3VAgNO3/VNaCl = = 0.0492 M The calculated concentration of NaCl = MW of NaCl x Molarity of NaCl = 58.44 g/mol x 0.0492 mol/L = 2.87ถ g/L Table 2: Determination of salt in butter - Titration Titration Titre Volume (mL) 1 6.3 2 6.2 3 6.2 The average titre value = = 6.233 mL The molarity of NaCl extract solution = MNaCl = MAgNO3VAgNO3/VNaCl = = 0.0125 M The amount of NaCl in 100mL extract = 0.0125mol/L x L x 58.44g/mol
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Studying the Rate of Reaction of catechol oxidase and how it affects pH levels Introduction: In this lab‚ we studied the activity of an enzyme that is found in fruits and vegetables called catecholase or catechol oxidase. An enzyme is a protein molecule that is a catalyst. Catechol oxidase is the enzyme in fruits and vegetables that turns them that undesirable brownish color; also commonly referred to as bruising or bruised. When walking through your regular grocery store and you find yourself in
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Quantifying the COX1 Gene within the Mitochondrial DNA of a Potato Introduction Respiration is a very important process for every living organism. While it is typically thought of as breathing in oxygen‚ and exhaling carbon dioxide‚ like all things‚ it must take place at the cellular level. The electron transport chain is responsible for cellular respiration. The process uses four complexes; the fourth is cytochrome c oxidase. Cytochrome C oxidase is responsible for the reduction of oxygen to water
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Stacy Hernandez Period 1 Mrs. Riley AP Biology Osmosis and Diffusion Lab I. Introduction: Diffusion is vital to many life functions of a cell‚ it allow the transportation of vitally important nutrients and compounds without the expenditure of excess metabolic energy. To explain diffusion‚ it is as if a bottle of perfume is opened at one end of the room‚ then in a short amount of time a person at the other end of the room can detect the scent of the perfume; this is the process of diffusion
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in which a potato catalase enzyme reacts to various assays with differing variables. To do so a baseline assay (undiluted extract and room temperature H2O2) was used within the experiment with only one other variable changed in the other assays. These variables included a boiled‚ frozen and then thawed‚ and frozen potato extract and dH2O instead of the potato extract. It was noted that the temperature and or way the potato extract was prepared effects how the enzyme with the potato will react
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A STUDY OF OSMOSIS Han Cheng Water passes through aquaporins in cell membranes from an area of high water concentration (low solute concentration) to an area of low water concentration (high solute concentration). This process is called osmosis. It requires no cellular energy to be used‚ and occurs due to the random‚ continuous motion of all molecules. If a cell is placed in an environment in which the concentration of water is less than in the cell (hypertonic)‚ water will flow from the cytoplasm
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