Qualitative Analysis of CarbohydratesHELPIodine reacts with starch to form a starch/iodine complex,which gives a characteristic blue colour to the reaction mixture.Glucose, lactose and sucrose do not give this reaction.Select the test:Iodine testAIodineSolutionResetGlucoseLactoseSucroseStarch TestAdded reagent/sSamplesObservation andinterpretationlodine TestGlucoseLactoseSucroseStarch

Iodine test is used for the determination of starch in a solution. Starch forms a deep-blue color…

Answered: Test Added reagent/s Samples…

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Similar questions

Which 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 options
In a tabular form, enumerate other chemical qualitative tests for carbohydrates, discuss its principle, chemical reagents employed and its positive test result.
Qualitative and Quantitative Tests for Amino Acids and ProteinsComplete the table: Test Reagents Positive Result Positive Indication Ninhydrin test Xanthoproteic acid test Millon's test Hopkins Cole test Pauly's diazo Test Lead sulphide test Histidine test Isatin test Folin’s McCarthy Sullivan Test Nitroprusside Test
https://www.youtube.com/watch?v=rKng5-ij6kQ Provide a schematic diagram for the Seliwanoff’s test methodologies in determining the presence of carbohydrates. Also, give the basic principle for the test. (not a graded question, video is very brief)
Which of the following tests is used to distinguish glucose from fructose?* A. Molisch test B. Seliwanoff's test C. Bial's Orcinol D. Kowarsky test E. None of the given options
Which test can be used to differentiate the following pairs of carbohydrates? Explain why and why other tests are not possible. Kindly answer a, b, and c. a. Fructose and galactose b. Ribose and glucose c. Glucose and maltose Different tests are: Molisch Test, Seliwanoff's Test, Bial's Test, Anthrone's Test, Barfoed's Test, and Osazone Test
Given Tagatose, Briefly explain its expected reaction (based on their structural formula) to the different qualitative tests for carbohydrates which are: (a) Molisch’s test (b)Fehling’s test (c) Bial’s test
Useful to distinguish starch and glycogen from other polysaccharides* Please choose one correct answer only. A. Lugol's iodine solution B. Seliwanoffs test C. Barfoeds test D. Benedicts test
Reagents: 8 ml conc. Sulfuric acid, 1.5 ml alpha naphthol, 1 ml iodine in KI, 4 ml conc. HNO3, 4 ml Seliwanoff’s reagent, 3 ml Bial’s-orcinol reagent, SAMPLE: 5% of lactose, sucrose, glucose, galactose, fructose, maltose, starch and xylose ( 10 ml each) Materials: 12 test tubes 20 ml, test tube rack, test tube brush, test tube holder, alcohol lamp, tripod, wire gauze, water bath, (10 ml) graduated cylinder, dropper, stirring rod, 3 droppers, 250 ml beaker Procedure: 1. Molisch Test – (use all 8 samples) Place 1 ml of each sample in different test tubes. Add 1 drops of alpha napthol reagent in each tube. Mix thoroughly. Incline the tube and CAREFULLY allow 1 ml of conc. H2SO4 to flow down the side of the tube. Note the color formed at the zone of contact between 2 liquids. 2. Iodine Test – ( use all 8 samples) place 1 ml of the sample in a test tube. Add a drop of iodine. Observed color produced. Heat (direct heating) and note change in color. Cool and record again the result.…
DESCRIBE THE RESULTS OF THE REDUCTION TEST FOR SUGARS USING THE FOLLOWING TEST PICRIC ACID TEST SUGAR RESULT 1. Glucose 2. Sucrose 3. Maltose 4. Fructose 5. Lactose 6. Galactose
PRODUCTS. Match the name of the product with the biochemical reaction. Products may be used more than once. Tests may require more than one answer. a. 2,3-butanediol b. ammonia c. fatty acids d. indole e. molecular oxygen f. phenylpyruvic acid catalase phenylalanine deamination triglyceride hydrolysis tryptophan degradation urea hydrolysis Voges-Proskauer test
a 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?

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Test Added reagent/s Samples Observation and interpretation lodine Test Glucose Lactose Sucrose Starch