The Effect of low pH on Enzyme Activity Academic Essay

Final Applied Lab Project (1 credit Lab Component) Addresses course outcomes 1-4: recognize and explain how the scientific method is used to solve problems make observations and discriminate between scientific and pseudoscientific explanations weigh evidence and make decisions based on strengths and limitations of scientific knowledge and the scientific method use knowledge of biological principles, the scientific method, and appropriate technologies to ask relevant questions, develop hypotheses, design and conduct experiments, interpret results, and draw conclusions This is the culminating lab assessment in BIOL 103. It is designed to assess your ability to apply the principles of the scientific method. The Effect of low pH on Enzyme Activity Design an experiment in which you will test the effect of an acidic fluid on enzymatic activity. Recall: enzymes are proteins! To complete this project, it may be useful for you to first review the Scientific Method Tutorial, the OLI module about pH and enzymes, Lab 1 (Introduction to Science) and Lab 4 (Enzymes). As you review Lab 4, you will be reminded that there are several factors that impact enzymatic activity: pH, temperature, and amount of reagent. It is OK to use the same enzyme/substrate/method as you did in lab 4 (but modify the treatment), or you can search on-line to find a different enzyme/substrate/method for measuring enzyme activity for your project (include all references). As you design your experiment for this project, please remember that you are trying to examine how an acidic fluid will modify the outcome of an enzymatic reaction. To successfully complete this project, you will need to identify the question(s) being asked in your experiment and the hypothesis that you are testing. In your experimental design, you must clearly explain what you are doing. That means that you will need to identify the enzyme, the substrate, the acidic fluid used as treatment, the control treatment and the method of measuring enzyme activity, as well as explain your experimental protocol. You must also thoroughly explain how the acidic fluid impacted enzyme activity based on the results from your own experiment as well as knowledge of enzymes and pH from the OLI modules, lab manual and potentially additional information sources. Hint: Keep in mind that the acid will change the environmental conditions of the experiment (for example, a low pH value could change the shape of the active site on the enzyme protein), without directly participating in the reaction. Lab Materials You may need all or some of the following, depending on your experimental design: Materials from your lab kit: pH paper hydrogen peroxide solution (you can purchase this at a pharmacy if you have used up the bottle that came with the lab kit) plastic beakers or cups vinegar yeast (can be purchased at grocery store if more is needed) balloons plastic bottle marker for labeling of beakers Cell phone/digital camera pictures required You may choose to use additional materials (different acidic fluids and/or different organisms and/or different substrate if you chose an enzyme other than catalase). Outline: Include the following in your outline: Name of enzyme you will use Name of organism (if applicable) The substrate and products in the chemical reaction Method for measuring enzyme activity Treatment: acidic fluid(s), pH, length of exposure, how you will treat your samples The control(s) in the experiment Hypothesis How you will present your data (table and/or type of graph) Anything else you would like to get feedback on before you start your experiment Write a lab report that includes the following: 1. Title page: descriptive title, your name, course name, semester 2. Introduction: general background information about enzymes and specific information about your chosen enzyme, the question(s) that you are asking and a clear hypothesis for your experiment (20 points). 3. Design an experiment. Provide a detailed description of the materials and methods used to conduct the experiment. Identify control and experimental samples, as well as independent and dependent variables. Also include the methods used for data collection and analysis (20 points). 4. Conduct the experiment and record your results. Take picture(s) of your results. What did you observe? Present your data in table and/or graph format. Remember to label everything and include the unit of measure with all numbers (20 points) 5. Use your knowledge of enzymes and pH to interpret and discuss your results. It may be necessary for you to refer to the OLI course modules, lab manual and/or use additional information resources. What effect does the acidic treatment have on enzyme activity? Did you get the expected results? Explain. (20 points) 6. State a specific and accurate conclusion. Is your hypothesis supported by the results? Looking back, how could you have improved your experiment? (10 points) 7. Include a list of references to all information sources used in APA format (5 points). Avoid Plagiarism It is very important to write with your own words. If you do copy one or two sentences directly (use sparingly), use quotation marks () around the copied text, followed by an in-text reference. All information sources need to be included in the reference list and as in-text references. Plagiarism will be reported to the proper UMUC authority. Guidance on how to avoid plagiarism can be found here: Submission Submit your final applied lab project in the assignment folder by the due date specified in the course schedule. Grading Your Outline will be graded based on the following criteria (100 points total):Excellent (90-100%) Good (70-89%) Adequate (60-69%) Unsatisfactory (0-59%) Outline 100 points Outline includes all the required components and planned experiment meets requirements for the assignment and is clearly and accurately described. Submitted on time. 90-100 points Outline missing one or two of the required components, and/orplanned experiment does not meet one of requirements for the assignment and/orminor issues with clarity and accuracy. 70-89 points Outline missing several of the required components, and/orplanned experiment does not meet several of the requirements for the assignment and/ormajor issues with clarity and accuracy. 60-69 points Outline missing most of the required components andplanned experiment does not meet the requirements of the assignment. 0-59 points Your Final Applied Lab Project will be graded based on the following criteria (100 points total): Excellent (90-100%) Good (75-89%) Adequate (50-74%) Unsatisfactory (0-49%) Introduction, Question and Hypothesis20 points Background information about enzymes in general and about specific enzyme used in project is clearly and accurately written. Questions and hypothesis are specific, relevant and clearly stated. 18-20 points Background information about enzymes in general and about specific enzyme is somewhat unclear and/or inaccurate. Questions and hypothesis could be more specific, relevant and clearly stated. 15-17 points Missing background information about enzymes in general orabout specific enzyme used in project orquestions and hypothesis. 10-14 point Missing background information about enzymes in general andabout specific enzyme used in project andquestions/hypothesis.0-9 points Experimental Design, Materials and Methods20 points Experiment is designed to directly test the hypothesis; description of experiment is detailed and well written and includes all materials and methods used.18-20 points Experiment is mostly designed to test the hypothesis and/ordescription of experiment is somewhat inaccurateand/or some information about materials and methods used is missingand/or minor problems with clarity an organization. 15-17 points Experiment is barely designed to test the hypothesis and/ordescription of experiment is inaccurate and/or most of the materials and methods used are missingand/or major problems with clarity an organization. 10-14 points Experiment is not designed to test hypothesis and/ordescription of experiment and materials and methods used are missing. 0-9 points Results20 points Results are clearly and accurately presented in a table and/or graph and picture(s). 18-20 points Results are presented, but minor problems with clarity and/or accuracy. 15-17 points Results are described, but major problems with clarity and/or accuracy and/or results not presented in table or graph. 10-14 points Results are not included0-9 points Discussion of Results20 points A clear, accurate and well organized discussion of results that demonstrates good knowledge of enzymes. 18-20 points Minor problems with clarity, accuracy or organization and/ordemonstrates some gaps in knowledge of enzymes. 15-17 points Major problems with clarity, accuracy or organization ordemonstrates minimal knowledge of enzymes. 10-14 points Missing discussion of results, or major problems with clarity, accuracy or organization and missing understanding of enzymes. 0-9 points Conclusion10 points A well stated conclusion that is accurate and specific and directly related to the data collected. Clearly stated whether or not the results support the hypothesis. Relevant suggestion for improvement of experiment. 9-10 points Conclusion stated, but slightly inaccurate, and/ornot directly related to data collected and/orsuggestion for improvement of experiment not very relevant. 7-8 points Conclusion stated, but inaccurate and/or barely related to data collectedand/or missing suggestion for improvement of experiment. 5-6 points Missing conclusion, only suggestion for improvement of experiment.0-4 points Citations5 points All references used are included and in correct APA format, in-text references are included. 5 points All references are included, but a few minor mistakes in APA format,and/or missing in-text references. 4 points Missing one or several references and/or major mistakes in APA format. 2-3 point No references included or references not in APA format.0-1 points Grammar and Spelling 5 points 0 3 minor spelling and grammatical errors 5 points Between 4 and 7 minor spelling and grammatical errors 4 points Between 8 and 12 spelling and grammatical errors 3 point More than 13 spelling and grammatical errors 0-2 points

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