Brooke Strowd AP Biology Ms. Butler 28 January 2013 I. Title: Effect of a Catalyst on Reaction Rate II. Introduction: The basis of the experiment is the enzyme; an enzyme is a biological molecule that acts as a highly selective catalyst. By combining with a substrate‚ an enzyme is able to create a new product that helps the body function. (Ex. Lactose/Lactase) A substrate is a molecule an enzyme acts upon‚ the two combine at an area called an active site. This active site allows induced fit
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Investigating the Effect of Concentration on the Rate of Enzyme Catalysed Reaction To investigate the effect of concentration on the rate of enzyme catalysed reaction I must know all the factors that affect it in order to investigate in this. Here are all the factors: Temperature- Enzyme like it warm but not too hot. Enzymes are biological catalysts‚ which speed up chemical reactions. They work most efficiently at the optimum point (37°C). If they are below 37°C they will work
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Changing the Rate of Reaction PART 1: PARTICLE SIZE Question: How does changing the particle size of marble (CaCO3) affect the rate of reaction when it is added to hydrochloric acid (HCl)? Hypothesis: If I change the particle size of marble to test how to change the rate of a chemical reaction‚ than the chemical reaction with the smallest marble particles will produce CO2 the quickest because the larger the surface area‚ the more place the hydrochloric acid will have to collide with the marble
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TITLE OF EXPERIMENT: An investigation of the iodine/propanone reaction. DATA COLLECTION AND PROCESSING : Chemical Equation: CH3COCH3 (aq) + I2 (aq) ( CH3COCH2I + H+ (aq) + I- (aq) Rate of reaction: R = V T Concentration of reactant after dilution : Volume of reactant x concentration of reactant Total volume of mixture Uncertainty for rate of reaction: R =( V + t ) x R V t Eg
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Biology lab AIM: To test a leaf for starch APPARATUS/MATERIALS : * bunsen burner‚ tripod stand‚ wire gauze(OR 90oC electric water bath OR hot plate) * 250 cm3 beaker * boiling tube * anti- bumping granules * forceps * test tube holder * white tile * leaf to be tested (hibiscus leaves are excellent) * 90% ethanol * iodine/potassium iodide solution PROCEDURE: The video above shows the steps in Testing a Leaf for the Presence of Starch. The Procedure outlined
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hold another paperclip at the appropriate distance: six cm‚ seven‚ eight‚ nine‚ ten‚ twelve‚ fourteen‚ sixteen‚ eighteen‚ and twenty centimeters. 5. Lab partner must close eyes tightly. 6. Starting with the largest distance‚ place either one or two ends onto your partners skin (ALTERNATE RANDOMLY so the partner can’t guess!!!) 7. Have lab partner tell you how many ends they can feel. Do this 5 or 6 times. 8. Then try the next smaller distance and repeat steps 6 and 7. 9. Record
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The Liver is the largest internal organ in the human body. The liver is the body’s processing and “manufacturing” plant. It has hundreds of roles but the most important is adjusting and monitoring the chemical composition of your blood‚ breaking down food to convert it into energy when you need it. It also helps you fight infections. Its dark color is because of a rich blood supply. In the average adult is is about 8 inches wide‚ 6.5 inches long and 4.5 inches thick and weighs approximately 3.5
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reaction rates and concentration (research paper) By katie prestage what are reaction rates? The rate of reaction is the speed in which a reaction takes place. This can be measured by the rate in which a reactant is used up‚ or the rate a product is created. If a reaction has a low rate‚ it means that the particles are combining at a slow speed. If the rate is high‚ it means that the particles are coming together at a fast speed. For example‚ the rusting of iron through oxidation has a slow
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assignments. A brief description of each input parameter is provided below. Refer back to this section as needed when you are working on different assignments. Click on the Change Inputs button to see all the parameters you can manipulate for this lab. A new page will open with buttons for each of the input parameters located at the left side of each page (initial population size will be open as the first input parameter). Click on each input parameter and read the descriptions below. Change each
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Lab #2: Energy in Cell Virtual Lab - Week 3 NAME: ________________________________________ 1. What is the importance of the light and dark reactions in photosynthesis? Photosynthesis works by absorbing light. Our sun gives off energy and the chlorophyll from the plant absorb this energy. The energy is then used to separate water into hydrogen and oxygen and then they combine hydrogen and carbon dioxide to make sugars. 2. What happens to food energy during photosynthesis? During
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