1. The adsorption solution used in SO2 analysis is… a. Tetrachloromercurate(V) b. Tetrachloromercurate(I) c. Tetrachloromercurate(III) d. Tetrachloromercurate(II) 2. Storage of samples under special conditions is carried out with the aim of… a. Samples that do not enter air b. Avoid repeated sampling c. So that it doesn't rot d. Avoid chemical reactions
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1. The adsorption solution used in SO2 analysis is…
a. Tetrachloromercurate(V)
b. Tetrachloromercurate(I)
c. Tetrachloromercurate(III)
d. Tetrachloromercurate(II)
2. Storage of samples under special conditions is carried out with the aim of…
a. Samples that do not enter air
b. Avoid repeated sampling
c. So that it doesn't rot
d. Avoid
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- 1. Given the following common laboratory materials, which of the three methods of heat sterilization do you think is the most appropriate and practical to use in sterilizing them Why do you think so ? Method of heat sterilization Reason a. Empty flasks b. L-rod (glass rod) c. 10 ml glass pipet d. Wire needles e. Antibiotic solution1. Tools that do not need to be brought when sampling is…a. thermometerb. Hygrometerc. PH meterd. DO meter 2. In the deposition method, one of the conditions that must be met is…a. The precipitate has a high solubility or solubility productb. The precipitate formed must be quite difficult to dissolvec. The precipitate formed does not have to be quite pured. Free precipitate form1. 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…
- Based on the information given, what separation technique(s) is/are most likely feasible? Please explain a. Recrystallization b.Decolorization c.Sublimation d.Distillation e.Extraction f.Chromatography38. Which test can distinguish between sesame oil and corn oil? a. Burchard test b. Baudouin test c. Sudan IV test d. Dichromate test 39. What solvent would be miscible with coconut oil? a. chloroform b. water c. both a and b d. neither a nor b 40. Which of the following is a product of saponification of fatty acids? a. glycerol b. NaOH c. both a and b d. neither a nor b1. The principle behind the test for phosphate is oxidative reaction, conversion of organic form to inorganic phosphate and a precipitation reaction. A. True B. False 2. Sakaguchi test determines amino acids with indole groups present. A. True B. False
- CLEARING AGENT Give the COMPOSITION of the ff. Clearing agent: 1. Xylene2.Toluene3.Benzene4.Chloroform5.Cedarwood oil6. Aniline Oil7. Clove oil8. Carbon tetrachloride1. A.) Which compound acts as dehydrating agent in Molisch's test? B.) With the correct answer above, what is its chemical function? 2. A.) Which compound is present in Fehling's A? B.) With the correct answer above, what is its chemical function? 3. A.) Which compound is present in Fehling's B? B.) With the correct answer above, what is its chemical function? 4. A.) Which compound acts as oxidizing agent in Benedict's Test? B.) With the correct answer above, what is its chemical function? 5. A.) Which compound acts as dehydrating agent in Bial's Test? B.) With the correct answer above, what is its chemical function?Choose the one answer that fits best. Which of the following statements regarding the proper procedure for using Micropipettes is NOT correct? O a. You cannot use a 2-20 µl micropipette to pipet 200 µl O b. To expel all the liquid from the tip, you have to press the eject button O c. To draw up solution, press and hold the plunger at the first stop before entering the solution O d. Micropipettes always require the use of a disposable plastic tip O e. While pipetting, micropipettes should always be held as straight as possible
- In the spectrofluorometric analysis of quinine, which of the following statements/phrases can be considered a factor level? A. Concentration of 2 ppm of iodide B. Concentration of quenchers C. The use of iodide D. Use of Quenchers2. Which of the following statements is true regarding steam sterilization? a. It is a universal technique, applicable to a product of any nature. b. At the same temperature, usually more effective than dry heat. c. Steam sterilization is amenable to a continuous workflow. d. The purpose of the steam is to keep the product from drying out during sterilization. Steam cannot be combined any other sterilization technique. е.Alpe Describe the tests used to identify Strep, and use a dichotomous key to successfully identify an unknown (what to look for in each) a. Hemolysis b. Optochin sensitivity c. Bacitracin sensitivity d. Growth in high salt environment