Seliwanoffs Test

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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REPORT SHEET
DATA AND RESULT:
A. Characteristic Tests of Carbohydrates
Sample
Solutions
Barfoed's
Molisch Test Benedict's Test lodine's Test
Seliwanoffe Test
Fehling's Test
Test
Negative
Negative
Positive
Glucose
Positive
Positive
Positive
Negative
Positive
Fructose
Positive
Positive
Negative
Positive
Lactose
Positive
Positive
Negative
Negative
Negative
Positive
Negative
Positive
Negative
Sucrose
Positive
Negative
Negative
Negative Negative
Negative
Negative
Negative
starch
Positive
POST-LAB QUESTIONS:
E. Seliwanoffs Test
1. Describe the evidence for a positive test.
2. What does a positive test indicate?
3. What is the chemical basis for a positive test?
4. Circle the names of the substances that gave a positive test.
Glucose Fructose Lactose Sucrose Starch
F. Fehling's Test
1. Describe the evidence for a positive test.
2. What does a positive test indicate?
3. What is the chemical basis for a positive test?
4. Circle the names of the substances that gave a positive test.
Glucose Fructose Lactose Sucrose Starch
Transcribed Image Text:REPORT SHEET DATA AND RESULT: A. Characteristic Tests of Carbohydrates Sample Solutions Barfoed's Molisch Test Benedict's Test lodine's Test Seliwanoffe Test Fehling's Test Test Negative Negative Positive Glucose Positive Positive Positive Negative Positive Fructose Positive Positive Negative Positive Lactose Positive Positive Negative Negative Negative Positive Negative Positive Negative Sucrose Positive Negative Negative Negative Negative Negative Negative Negative starch Positive POST-LAB QUESTIONS: E. Seliwanoffs Test 1. Describe the evidence for a positive test. 2. What does a positive test indicate? 3. What is the chemical basis for a positive test? 4. Circle the names of the substances that gave a positive test. Glucose Fructose Lactose Sucrose Starch F. Fehling's Test 1. Describe the evidence for a positive test. 2. What does a positive test indicate? 3. What is the chemical basis for a positive test? 4. Circle the names of the substances that gave a positive test. Glucose Fructose Lactose Sucrose Starch
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