Unknown #1 Vomit Serratia marcescens & Bacillus cereus Biol 251 Microbiology 5/14/2009 Introduction The purpose of this study is to differentiate and identify two unknown organisms provided by the instructor in a nutrient broth. It is only known that the two organisms are from vomit; one is gram-positive and the other is gram-negative. It is necessary to first separate the two organisms by inoculating a nutrient agar plate using the streak-plate method. The
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experiment conducted was to observe if a higher concentration or lower concentration gradient would affect the diffusion rate of the iodine moving through the starch concentration. This was shown to be an accurate experiment as with a higher concentration gradient the diffusion that did occur happened a lot faster and diffused more efficiently compared to no iodine solution and just water. This is due to the molecular collisions speeding up the experiment in the time period given because of the Soule
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EXPERIMENT: Biological Molecules Here are your goals for this lesson: • To conduct tests for glucose‚ starch‚ lipids and proteins • Use these test results to identify the biological molecules found in food Student Name: Brittany Gerdes Date Experiment done:12-20-12 Date Report Completed: 12-20-12 Name of Grader: Hypothesis: A prediction of what you think the results of the project will be. Write your hypothesis before you begin the experiment and‚ if the experiment has
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energy storage‚ and it also plays an important role in structural of living organisms. There are various of test can be done to identified the present of carbohydrates in foods but the few most well-know are the Molisch test‚ Bennedict test and the iodine test. Proteins are made up of amino acids‚ which are the simplest unit of proteins. The few maintests to identify the present of the proteins are Xanthoprotic test‚ Biuret test and also Ninhydrin test.The test used to identify the present of fats
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of Polyphenol Oxidase and Peroxidase when mixed with catechol‚ caffeic acid‚ pyrogallad‚ tyrosine‚ guacol‚ and water‚ to test the effect of inhibitors on these enzymes‚ to show the specificity of Polyphenol Oxidase and also the effect of amylase on starch. Theory: Enzymes are large molecules that increase the rates of chemical without themselves undergoing any change (Bettelheim‚ Brown‚ Campbell and Farrell 2010). Enzymes are the catalyst of biological processes; they bring the reaction catalyzed
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Carbohydrates‚ Proteins‚ lipids‚ and nucleic Acid Lab Exercise 6 Date: 9/17/12 Bio 102-11 Purpose the purpose of this experiment was to perform test to detect the presence of carbohydrates‚ proteins‚ lipids‚ and nucleic acids. Explain the importance of a positive and a negative control in biochemical test. Use biochemical test to identify an unknown compound. Background Most organic compounds in living organisms are carbohydrates‚ proteins‚ lipids‚ and nucleic acids they are called macromolecules
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Biology- Change in pH Aim: To investigate the affect that change in pH levels has on a particular enzyme‚ in this case amylase. Hypothesis: In this investigation I expect as the pH reaches the optimum level‚ the rate of reaction will be fastest‚ compared to other pH levels. It is also suspected that after the enzyme has reached optimum level the enzyme activity will decrease. Through further study of the optimum level of amylase I found that the enzyme usually has an optima pH of 8. It is known
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tubes after you have added the iodine solution. (Again‚ be sure that you are close enough to see the results clearly.)
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Final Year Project Progress Report Title: Fat Content Analysis and Characterization of Food Class and Group No. : AS114103/2A1 Student Names : Chan Hoi Ching (120586347) : Chan Wai Yi (120464356) : Cheung Kit Cheung(120552694) : Lam Chi Ching (120224281) : Lam Pik Shan (120181829)
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transport because it can be delayed or expedited based on how thick the fluid is. Experiment 2 1. Iodine seeped into the bag causing it to turn purple. 2. The starch 3. No 4. The contains more starch. The beaker contains more glucose. 5. The beaker was more hypotonic in regards to the IKI solution while the baggie was more hypotonic in regards to the starch. 6. The iodine would seep out of the bag and turn the beaker solution purple. 8. The dialysis tubing represents a
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