In the third video, glucose, glycine and maltose are tested as samples with the Benedict's reagent. Test Tube COLOR CHANGE EXPLANATION 1. Glucose 2. Glycine 3. Maltose If glucose and maltose are both sugars, why is maltose not as red in color as glucose?
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- Directions: Indicate whether the given compound will yield positive (+) or negative (-) results. Acrolein's Test _________1. Glucose _________2. Sucrose _________3. Butter _________4. Canola Oil _________5. Albumin Huble's Test _________1. Glucose _________2. Sucrose _________3. Butter _________4. Canola Oil _________5. AlbuminThe 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…Give a CHEMICAL test that can differentiate the pair of sugars and give the results for both. No repetition of test is allowed. Sugars Name of Test Expected Results starch and glycogen sucrose and glucose galactose and glucose lactose and fructose
- Does fructose can produce a positive result in Seliwanoff Test? Elaborate your answera test tube contains both starch and the enzyme amalyase. after 30 minutes, thebtest for starch is negative and the test for simple sugar is positive, why?The stain used in the starch hydrolysis test: a.Is the same stain used in the capsule stain b.Stains starch released by organisms c.Does not stain the media surrounding positive organisms d.Tests for the presence of phospholipase
- An 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 oilWhich of the following results from TSI test is FALSE? A. Yellow slant, yellow butt, split agar means glucose, lactose and/or sucrose fermented gas produced B. Yellow butt, red slant means glucose only fermented C. Black slant, red butt means peptones were catabolized D. Red slant, black butt means glucose fermented hydrogen sulfide gas produced E. Red butt, red slant means all sugars fermented, no gas producedAn 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.
- In starch test describe and explain the change color in results:A. Yellow to BrownB. Blue to BlackWhich test can be used to differentiate fructose and glucose? Barfoed’s Test Bial’s Orcinol Test Molisch Test Iodine Test Benedict’s Test Seliwanoff’s TestMultiple choice (Refer to picture) Which of the statements is NOT TRUE about the sample in Salkowski test? * Lower layer becomes red with a green fluorescence A molecule of cholesterol reacts with sulfuric acid to yield bi-cholestadien There should be an excess sulfuric acid to convert bi-cholestadien to bisulfonic acid of bi-cholestadien. It is best to shake the solution for a more accurate result.