1. Which do you think is NOT a property of cholesterol? A. It appears as yellowish crystalline solid B. It appears as crystals, under the microscope, showing a gotched appearance C. it is soluble in water and soluble in organic solvents such as chloroform D. Sakowski Test is used for the qualitative identification and quantitative estimation of cholesterol 2. Bile is produced by the gall bladder. A. TRUE B. FALSE 3. What is the process by which bile is produced from cholesterol? A. Hydrolysis B. Oxidation C. Condensation
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1. Which do you think is NOT a property of cholesterol?
A. It appears as yellowish crystalline solid
B. It appears as crystals, under the microscope, showing a gotched appearance
C. it is soluble in water and soluble in organic solvents such as chloroform
D. Sakowski Test is used for the qualitative identification and quantitative estimation of cholesterol
2. Bile is produced by the gall bladder.
A. TRUE
B. FALSE
3. What is the process by which bile is produced from cholesterol?
A. Hydrolysis
B. Oxidation
C. Condensation
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- Answer the numbers 1 & 2 1. Positive with Molisch Test and Benedict Test but negative with both Iodine Test and Seliwanoff's Test, immediate precipitate formation with Barfoed's Test, and muddy brown coloration with Bial's Test. a.Glucose b.Fructose c.Ribose/Arabinose d.Maltose e.Sucrose 2. Positive with Benedict's Test and Seliwanoff's Test, and immediate precipitate formation with Barfoed's Test. a.Glucose b.Fructose c.Ribose/Arabinose d.Maltose e.Sucrose1. Provide the Principles and detailed procedures of the following tests for the "Color Reaction of Proteins". A. Biuret Test B. Xanthoproteic Test C. Millon's Test D. Ninhydrin Test E. Hopkins-Cole Test F. Sulfur Test G. Heller's Test1. It is used to detect the presence of free amino groups, thus, differentiating primary from secondary amino acids. a.Lead-sulfide test b.Ninhydrin test c.Hopkins cole's test d.Xanthoproteic test e.Biuret test 2. It is used to detect the presence of aromatic groups that are derivatives of benzene. a.Lead-sulfide test b.Ninhydrin test c.Hopkins cole's test d.Xanthoproteic test e.Biuret test
- a. Silver reduction test: What is the substance responsible for the color production? b. Jaffe’s test: To what is the color due to? c. Ammoniacal zinc chloride test: What compound is responsible for the color? What are the pigments normally present in urine? d. Sulfates: From what substance are sulfates derived? In what conditions is sulfate elimination increased? e. Detection of Chlorides: What is the normal amount of chlorides eliminated in 24 hours? In what forms are they eliminated? In what conditions is the elimination diminished and eliminated increased? What is a threshold substance? Is chloride a substance substance? f. Detection of Phosphates: What is a triple phosphate? When it is formed? What are the sources of the phosphates found in urine?Which of the following is the test for Methionine A. Biuret Test B. Ninhydrin Test C. Xanthoproteic Test D. Test for sulfur E. Hopkin’s Cole Test F. Millon’s Test Which of the following is the test for Phenylalanine A. Biuret Test B. Ninhydrin Test C. Xanthoproteic Test D. Test for sulfur E. Hopkin’s Cole Test F. Millon’s Test1. what cause the reaction of the rancid oil to ph paper to be different from that fresh oil 2. what is the chemical significance of rancid oil 3. what is the principle involved in the development of rancidity ? what are the stages in the development of rancidity. 4.define emulsifcation and surface tension. 5. cite some biological significance of emulsification and surface tension 6. what is the significance of the bromine test ? explain the meaning of the results . 7. explian the differences in the number of drops of liquid delivered using the same 1ml pippete
- A. Detecting Dextrin in Starch 1. Iodine Test for Starch Describe any change that took place when Iodine was added. 2. Preparation of Dextrin from Starch a. Describe the color of starch while being heated. b. Describe the change upon the addition of Iodine. What color indicates the presence of dextrin? c. Compare the result obtained with Procedure 1. d. Describe the color change when Iodine was added to the solution of dextrin from the supply shelf. B. Reduction test for Sugars 1. FEHLING'S TEST SUGAR 1. Glucose 2. Sucrose 3. Maltose 4. Fructose 5. Lactose 6. Galactose 2. BENEDICTS TEST SUGAR 1. Glucose 2. Sucrose 3. Maltose 4. Fructose 5. Lactose 6. Galactose 3. BARFOED'S TEST SUGAR 1. Glucose 2. Sucrose 3. Maltose 4. Fructose 5. Lactose RESULT RESULT RESULTThis test gives red color, indicating the presence of cysteine.* A. Lead acetate test B. Sullivan's test C. Hopkins-Cole tesi D. Ninhydrin test E. None of the given optionsThe glyoxylic test is a qualitative test for the presence of a.histidine b.all of these c.tryptophan d.alanine
- 25. Which lipoprotein prevents the formation of plaque in the artery? a. HDL b. VLDL c. LDL d. chylomicrons 29. Which sample would test negative in saponification test? a. cholesterol b. 18:2 fatty acid c. both a and b d. neither a nor bWhich of the following tests gives bluish green product due to the presence of carbohydrates?* A. Molisch B. Anthrone C. Benedict D. Seliwanoff E. None of the given options1. give other urinary constituents which may reduce benedict’s qualitative solution other than glucose. 2. What Substances Give The Same Reaction As Sugar With Nylander’s Test And How Do You Remove It? 3. by what other method can reducing sugars be differentiated from each other and from glucose? 4. what substances interfere with the tests for fructose? for lactose? 5. what sugar causes the same color reactions with the test for pentoses? why? 6. what other substances interfere with the indican reactions? 7. Why should the specimen be albumin free when performing the chloride test for urine?