IB Chemistry Experiment 4 Composition of a Post-1983 Penny Lab Report Background: Through the use of percent composition one can easily find out how much of a certain element is in a compound or an item such as a post-1983 penny. The experiment will be using HCl a strong acid to dissolve all the zinc inside the outer copper shell. The reaction follows as such; Zn+2HCLZnCl2+H2‚ but there will be no reaction with copper. The portion that will be measured is the mass of copper left after all of
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Introduction The purpose of this lab was to identify unknown bacteria cultures using various differential tests‚ and my unknown bacteria is #17. The identification of these unknown cultures was accomplished by separating and differentiating possible bacteria based on specific biochemical characteristics. Whether the tests performed identified specific enzymatic reactions or metabolic pathways‚ each was used in a way to help recognize those specifics and identify the unknown cultures. The differential
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Bolding_____________ Date________________ Cellular Respiration Webquest Worksheet (from: http://zunal.com/webquest.php?user=19049) Directions: Answer in your own words behind or under the questions. Do not copy and paste unless told to do so and then use quotes. Part I. Process Overview http://staff.jccc.net/PDECELL/cellresp/respintro.html Read the entire page! These questions are not in order! How is cellular respiration like combustion (burning)? [2nd paragraph]
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Antibiotic Lab Report By: Sierra Toll Hour: 6 Title: The effects of antibiotics on the growth of Escherichia Coli Problem: How do antibiotics affect the growth of E coli? Hypothesis: If Penicillin is applied to the bacteria‚ then the zone of inhibition will be larger. Background: The purpose of this lab was to see how effective a certain antibiotic is to kill E coli. The lab tested three antibiotics‚ Penicillin‚ Erythromycin‚ and Neomycin. The zone of inhibition‚ which is the amount of space
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512 Enzyme Catalysis Lab Report Pre-lab Questions: 1. Write a balanced chemical equation with state symbols for the reaction catalyzed by peroxidase. 2H2O2 2H2O + O2 (4H1 4O) (4H + 2O + 2O) 2. What is the substrate(s) of this reaction? What is the catalyst? Substrate = H2O2 hydrogen peroxide Catalyst = peroxide 3. At what approximate temperature do enzymes normally operate in the body of a warm-blooded animal? Would your answer change if the enzyme came from a plant or yeast? Enzymes normally operate
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Diffusion and osmosis go hand-in-hand. Osmosis is generally the same as diffusion‚ however‚ deals solely with water. Osmotic pressure is the pressure of a solution against a semi-permeable membrane to prevent water from flowing into the membrane. In this lab‚ we are going to study tonicity; tonicity is the measure of this osmotic pressure and is the differential of pressure between two solutions separated by a selective membrane. To help identify the relative concentrations of solute particles of different
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General Biology I‚ Fall 2011 Lab Report 3 Name: Luan Nguyen Date: 11-30-11 Lab: Gel Electrophoresis Purpose of this lab: In this laboratory investigation‚ students will analyze hypothetical human DNA using restriction endonucleases and gel electrophoresis to match samples from a crime scene to a suspect. Introduction: Your analysis unit will use gel electrophoresis to determine the guilty party. Electrophoresis is a technology in science that allows an individual to separate
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effect that temperature has on the growth and respiration of yeast fermentation. The growth and respiration of the yeast can be determined by using a glucose/ yeast solution mixed with water in flasks set at different temperatures. Yeast in order to produce‚ has to make energy‚ to carry out all cellular functions (Spicer‚ & Holbrook‚ 2007). The concept that aerobic metabolism of all yeasts‚ is determined by the relative sizes of the transport rate of sugar into the cell and the transport rate of respiratory
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BioLab3 Lab Report 5 Enzymes Student Name: Cooper Lyon I. Enzyme Structure and Function EXERCISE 1 – Preparation of an enzyme activity standard At five minute intervals over the next fifteen minute period‚ record the color intensity of the solution of each test tube. Time (min) Tube S1 Potato Extract + Catechol Tube S2 Potato Extract + Water Tube S3 Catechol + Water 0 Shade of Yellow Clear/Milky Clear/Milky 5 Shade of Yellow Clear/Milky Clear/Milky 10 Orange Clear/Milky Clear/Milky 15
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Make sure that there are no problems with your lab that could affect the results before you turn on the light source‚ for example‚ a broken beaker or light source. 12. Make a table to record your results from the lab with. Make the table 4 columns wide‚ mark the first column with “Time”. Mark the second column with “number of floating chads in beaker #1”. Mark the third column with
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