What is the purpose of adding hydroquinone? What is the purpose of washing the egg homogenate with 1% saline solution? Predict if the lipid below will give a positive result to the tests below. Then, indicate the portion on the structure that contributes to the positive result for its corresponding test. CH₂-O-C (CH2)16CH3 CH O Test A Liebermann-Burchard Test CH2–0-P—0–CH2CH2-N(CH3)3 B Test for Phosphate O C Ninhydrin Test -(CH2),CH=CHCH,CH=CH(CH2) CH3 Yes or No Test D Molisch Test E Kraut's Test F Acrolein Test Yes or No
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- What does translucent spot mean with regards to lipid? Identify the control for this test. 1. Oil 2. Cheese 3. Water 4. CheeseAn unknown sample was tested if there is a presence of lipid, after the test it shows that it is positive for translucent test, soluble with chloroform, produced a pungent odor in acrolein test, produced a red color for Baudouin Test, and the violet color disappeared in Huble’s Test. What is the sample? Group of answer choices A lipid that is saturated, contain glycerol, and sesame oil A lipid that is saturated, doesn’t contain glycerol, and sesame oil A lipid that is unsaturated, doesn’t contain glycerol, and sesame oil A lipid that is unsaturated, contain glycerol, and sesame oilAn unknown sample was tested if there is a presence of lipid, after the test it shows that it is positive for translucent test, soluble with chloroform, didn’t produce a pungent odor in acrolein test, didn’t produce red color for Baudouin Test, and violet color disappears in Huble’s Test. What is the unknown sample? Explain your answer.
- The table below summarizes the results for Millon's test. Provide the correct remarks from the results if Negative for Millon's Test or Positive for Millon's Test and if Contains phenolic hydroxy group or Does not contains phenolic hydroxy group.Which test can be used to differentiate mannose and maltose? Molisch Test Seliwanoff’s Test Benedict’s Test Barfoed’s Test Iodine Test Bial’s Orcinol TestWhich test can be used to differentiate maltose and sucrose? Molisch Test Seliwanoff’s Test Iodine Test Barfoed’s Test Bial’s Orcinol Test Benedict’s Test
- The reults for the macroscopic part: 0.30M glycerin – solution was translucent (could see text behind the test tube) 0.15M NaCl – solution was opaque (could not see text behind the test tube) 0.30M NaCl – solution was opaque (could not see text behind the test tube) 0.15M glucose – solution was translucent (could see text behind the test tube) 0.30M glucose – solution was opaque (could not see text behind the test tube) 0.30M Urea – solution was translucent (could see text behind the test tube) Results for microscopic part: 0.30M glycerin – no cells present 0.15M NaCl – normal sized cells 0.30M NaCl – crenated (shrunken and star-shaped) cells 0.15M glucose – no cells present 0.30M glucose – normal sized cells 0.30M Urea – no cells present Determine the osmolarity (hypoosmotic, isosmotic, or hyperosmotic) and tonicity (hypotonic, isotonic, hypertonic) of the following solutions.In which solutions did the osmolarity NOT match the tonicity? For those solutions, why did the osmolarity…Fill up the table below. For inferences, indicate the identity of the macronutrient being tested in milk Chemical Test Observations Inferences a. Phenolphthalein test b. Biuret Test c. Molisch Test Film Formation What is observed during boiling of milk? Explain your observation and identify the milk component that was formed. Separation of Casein and Whey 3.1 What is observed during the addition of acetic acid in milk? Explain your observations by identifying the milk components that were formed. 3.2 Fill up the table below to summarize the confirmatory test for casein and whey. Test Sample Filtrate Residue / Precipitate Milk Component Reagents Observations Inferences 3.3 Give the function or importance of casein and whey. Test for Milk Fat Briefly describe how milk fat is being tested?Give the positive result for the test of ribose Give the positive result for the test of deoxyribose. Give the positive result for the test of phosphates. Give the positive result for the test of purines. Give the positive result for the test of pyrimidines.
- . List whether each of the following substances was positive or negative for reducing sugar, as indicated by the Benedict's test. a. Corn syrup (1 point) b. Table sugar (1 point) c. Water (1 point) d. Unknown 1 (1 point) e. Unknown 2 (1 point) f. Unknown 3 (1 point) g. Unknown 4 (1 point) ~~3. List whether each of the following substances was positive or negative for starch, as indicated by using iodine. a. Onion juice (1 point) b. Water (1 point) c. Cornstarch (1 point) d. Unknown 1 (1 point) e. Unknown 2 (1 point) f. Unknown 3 (1 point) g. Unknown 4 (1 point) ~~4. The Sudan III test has been performed for you. Please see the image below to answer question 4a-g: Were the following substances positive or negative for lipids, as indicated by the Sudan III test? Sudan III Results a. Oil (O) (1 point) b. Butter (B) (1 point) c. Flour (F) (1 point) d. Unknown 1 (1 point) e. Unknown 2 (1 point) f. Unknown 3 (1 point) g. Unknown 4 (1 point) ~~5. List whether each of the following…Which test can be used to differentiate starch and sucrose? Benedict’s Test Seliwanoff’s Test Molisch Test Iodine Test Bial’s Orcinol Test Barfoed’s TestAn unknown solution contains a single pure sugar. It gives positive results to Molisch’s and Benedict’s tests but is negative for all others. What is the sugar? Is it sucrose, lactose, or xylose? Explain your choice.