2. During digestion, what happened to the sample analyte during this process? Provide the chemical reaction if possible. 3. On the analysis, what is the importance of calibrating the machine? What happened to the analyte during the analysis of AAS?
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2. During digestion, what happened to the sample analyte during this process? Provide the
3. On the analysis, what is the importance of calibrating the machine? What happened to the analyte during the analysis of AAS?
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- 1. What are the importance of ashing the sample? 2. During digestion, what happened to the sample analyte during this process? Provide the chemical reaction if possible. 3. On the analysis, what is the importance of calibrating the machine? What happened to the analyte during the analysis of AAS?1. Draw/illustrate the chemical reaction involved in Barfoed's test and explain the purpose of this qualitative test? 2. Draw/illustrate the chemical reaction involved in Seliwanoff's test and explain the purpose of this qualitative test? 3. Draw/illustrate the chemical reaction involved in Benedict's test and explain the purpose of this qualitative test? 4. Draw/illustrate the chemical reaction involved in Lugol's test and explain the purpose of this qualitative test?1. Give the importance of carbohydrate fermentation test in biochemical testing and enumerate the enzymes that are involved. (5 points) 2. What are the substances added in the culture media utilized by the organism producing hydrogen sulfide? Give 2 other media used for the production of hydrogen sulfide. (5 points) 3. Explain the mechanism taking place in the hydrolysis of urea which leads to the formation of bluish red color. ( 5 points) 4. Discuss why human blood plasma will not always yield reliable results. (5 points)
- 12. Jessica bought a tamago-yaki (fried scrambled egg) and decided to isolate the lipids from it through solvent extraction. After obtaining the organic layer, she added acetone until formation of precipitate stopped. She performed several tests on the precipitate and supernatant she obtained after centrifugation. 12.1.Fill in the table below with the result of each of the qualitative tests performed on the obtained precipitate and supernatant. Test Precipitate Supernatant Sudan IV Red color Acrolein test Test for Phosphates No visible change Leibermann- Burchard Test Black solution 12.2. Jessica wanted to know what phospholipids are found in her tamago-yaki. Using thin-layer chromatography, Jessica analyzed her lipid extract. She used the following standards: A: cardiolipin B: phosphatidylethanolamine C: phosphatidylserine D: phosphatidylcholine ← SOLVENT FRONT ← SAMPLE BLOTS A B Ċ D She obtained the chromatogram via iodine staining shown in the right (S is for the lipid extract).…1. Give the importance of carbohydrate fermentation test in biochemical testing and enumerate the enzymes that are involved. 2. What are the substances added in the culture media utilized by the organism producing hydrogen sulfide? Give 2 other media used for the production of hydrogen sulfide. 3. Explain the mechanism taking place in the hydrolysis of urea which leads to the formation of bluish red color. 4. Discuss why human blood plasma will not always yield reliable results.A biochemist discovers and purifies a new enzyme, generating the purification table below. Procedure Total protein (mg) 20,000 5,000 4,000 Activity (units) 4,000,000 3,000,000 1,000,000 800,000 750,000 675,000 1. Crude extract 2. Precipitation (salt) 3. Precipitation (pH) 4. Ion-exchange chromatography 5. Affinity chromatography 6. Size-exclusion chromatography From the information given in the table, calculate the specific activity of the enzyme after each purification procedure. b. Which of the purification procedures used for this enzyme is the most effective (I.e. gives the greatest relative increase in purity)? Which of the purification procedures is least effective? d. Is there any indication based on the results calculated in part A that the enzyme after step 6 is now pure? What else could be done to estimate the purity of the enzyme preparation? 200 50 45 a. C.
- 1. What type of reaction occurred when the samples (enumerated) reacted with the Molisch reagent? Give the chemical equation for each.a. Glucoseb. Sucrosec. Fructosed. Lactosee. Galactosef. Ribose 2. Explain the mechanism behind the test in simple terms. 3. What are the important products of the reaction of each sample?A biochemist discovers and purifies a new enzyme, generating the purification table below. Procedure Total protein (mg)Activity (units) 1. Crude extract 20,000 4,000,000 2. Precipitation (salt) 5,000 3,000,000 3. Precipitation (pH) 4,000 1,000,000 4. lon-exchange chromatography 200 800,000 5. Affinity chromatography 50 750,000 6. Size-exclusion chromatography 45 675,000 (a) From the information given in the table, caleulate the specific activity of the enzyme after each purification procedure. (b) Which of the purification procedures used for this enzyme is most effective? (c) Which of the purification procedures is least effective? (d) Is there any indication based on the results shown in the table that the enzyme after step 6 is now pure? (e) What else could be done to estimate the purity of the enzyme preparation?A biochemist discovers and purifies a new enzyme, generating the purification table below. Procedure Total protein (mg)Activity (units) 1. Crude extract 20,000 4,000,000 2. Precipitation (salt) 5,000 3,000,000 3. Precipitation (pH) 4,000 1,000,000 4. lon-exchange chromatography 200 800,000 5. Affinity chromatography 50 750,000 6. Size-exclusion chromatography 45 675,000 (a) From the information given in the table, calculate the specific activity of the enzyme after each purification procedure.
- . A pharmacist had 6 grams of codeine sulfate. He used it in preparing the following: 12 capsuleseach containing 0.0435 gram, 14 capsules each containing 0.145 gram and 23 capsules eachcontaining 0.011 gram. How many milligrams of codeine sulfate were left after he had preparedthe capsules?A pharmacist had 6 grams of codeine sulfate. He used it in preparing the following: 12 capsules each containing 0.0435 gram, 14 capsules each containing 0.145 gram and 23 capsules each containing 0.011 gram. How many milligrams of codeine sulfate were left after he had prepared the capsules?1. Identify what test is being described: Refers to the breaking of peptide bonds that connect amino acids to compose protein ? A. Hydrolysis B. Denaturation C. Heat denaturation D. Organic solvent denaturation E. Biuret test F. Hopkins – Cole Reaction G. Millon’s test H. Ninhydrin Test I. Sulfur test J. Xanthroproteic Test K. Chromatography L. Paper chromatography M. Competitive inhibition N. Noncompetitive inhibition O. Rancidity P. Hydrogenation 2. Identify what test is being described: Test that detects the free amino group in amino acids ? A. Hydrolysis B. Denaturation C. Heat denaturation D. Organic solvent denaturation E. Biuret test F. Hopkins – Cole Reaction G. Millon’s test H. Ninhydrin Test I. Sulfur test J. Xanthroproteic Test K. Chromatography L. Paper chromatography M. Competitive inhibition N. Noncompetitive inhibition O. Rancidity P. Hydrogenation 3. Identify what test is being described: A foreign substance, which is structurally similar to the substrate, competes for…To prepare a vaginal irrigation, a nurse uses 3 tsp of vinegar and 1.5 L of water. a. How many ml of vinegar should she use? b. If she prepares a solution using only 500 ml of water, how many ml of vinegar should she use?