Homework Answers
1) It is disaccharide but not a reducing sugar because it consists of two monosaccharides which are bonded by alpha 1-1 glycosidic linkage and there is no free anomeric carbonyl group (C=O).
Both the aldehyde groups are not free. Hence it is non reducing sugar .
The above mentioned sugar would be trehalose which is formed from two alpha glucose units which are bonded by 1-1 linkage.
1) A reddish orange solid with Benedict's test - infers moderate reducing sugars
b) A reddish precipitate with the Barfoed's test - reducing monosaccharide/disaccharide
c) A red color within 1 minute with the Seliwanoff's test - Presence of ketoses
d) A yellow color with the iodine test - infers absence of starch
As above first three tests are positive then the carbohydrate would be monosaccharide ketose sugar like fructose.
Add Answer to:
• Is the following disaccharide a reducing sugar? Explain. CH OH OHO ОН СН,ОН OH OH...
Problems and questions 1. Is the following disaccharide a reducing sugar? Explain. сн-Oн OH OH OH о CH2OH ОН OH Он...
Problems and questions 1. Is the following disaccharide a reducing sugar? Explain. сн-Oн OH OH OH о CH2OH ОН OH Он 2. The following test results were observed in a lab experiment: A reddish-orange solid with the Benedict' test A reddish precipitate with the Barfoed's test A red color within 1 minute with the Seliwanoff's test A yellow color with the iodine test Name the carbohydrate that you would expect to show these results. [Reminder: there is one more problem...
ne u ral features of car rots encruent, which of the following to distinguish reducing monosaccharides...
ne u ral features of car rots encruent, which of the following to distinguish reducing monosaccharides from reducing disaccharides? (a) Benedict's Test (c) Iodine Test (b) Molisch Test (d) Barfoed's Test for the m arketohexoses is indicated by 5. In the Seliwanoff's test, a positive what color? (a) purple (c) dark reddish brown (d) greenish-blue (b) red-orange 6. Vitamin C is also known as (a) sodium hydroxide (c) ascorbic acid (d) glucose (b) sulfuric acid 7. The oxidation of secondary...
PLEASE HELP ME WITH THE REDUCING SUGAR and the question at the end!!!! Hydrolysis of Macromolecules...
PLEASE HELP ME WITH THE REDUCING SUGAR and the question at the end!!!! Hydrolysis of Macromolecules Experiment (dry lab) Benedict’s Test for reducing sugars (with heat) TUBE SUBSTANCE TESTED FINAL COLOR TEST RESULTS (+ or -) IF POSITIVE, name the reducing sugar A Starch *without* saliva Clear blue - B Starch *with* saliva Thick yellow + Question What happened to the macromolecule when saliva was added to the test tube?
2. Name the following alcoholis. ame: Cyclpentah Structure: Name: Structure: ОН CH, CH,CH,C- OH CH Name:...
2. Name the following alcoholis. ame: Cyclpentah Structure: Name: Structure: ОН CH, CH,CH,C- OH CH Name: Name: Structure: Structure: ОН Сн, он CH, -CH-CH2-CH, CH-CH, CH3 3. Write the product of the following oxidation reactions (if no reaction, write NR). CH, OH CH3-CH-CH, CH, CH-CH, +(0) — лон +(0) - Ketone CH, OH CH3 CH, CH, CH-CH-CH-CH, +(0) -OH + (0) 11-10 Experiment 11 Alcohols and Phenols Post-Lab Questions 1. Write the structures and classifications of the following alcohols: 2-bromo-3-pentanol...
CARBOHYDRATES POST-LAB QUESTIONS CONT'D 23.Draw the Haworth structure of lactose and explain why this disaccharide gives...
CARBOHYDRATES POST-LAB QUESTIONS CONT'D 23.Draw the Haworth structure of lactose and explain why this disaccharide gives a positive Benedict's test; make sure to circle the part of the structure that is responsible for the reaction with Benedict's reagent. [5pts) Haworth Projection: (2.5 points) Hemiacetal circled / indicated (2.5 points) CARBOHYDRATES POST-LAB QUESTIONS CONT'D 24. When Benedict's reagent reacts with a reducing sugar, it oxidizes the aldehyde functional group to a carboxylic acid. As seen in the figure below: only a...
Please, fill in first table for Seliwanoff's Test for Ketoses. Additional info is found in the...
Please, fill in first table for Seliwanoff's Test for Ketoses.
Additional info is found in the images following table. (Second
table is info and image following).
Part C: Seliwanoff's Test for Ketoses Seliwanoff's Test Results Test Tube Sample Prediction Ketose? (Y/N) Observations Distilled water Peach / no change Glucose Peach to red slowly Fructose deep red solution very quickly Sucrose deep red solution quickly Lactose Peach to red slowly Starch Peach to red very slowly Mystery sample Peach to red...
14. Lab Exercise 5-1 is an interesting way to run these test tube experiments without oxygen...
14. Lab Exercise 5-1 is an interesting way to run these test tube experiments without oxygen - seal the tube with a layer of clear mineral oil on top (see the figure in the manual). Based on this figure and the Table of Results for this experiment, if the sealed tube is all green or slightly blue but the unsealed tube has any amount of yellow, what type of energy metabolism does that organism have? a. Oxidative only b. Oxidative...
TIL. PRE-LAB QUESTIONS - Experiment 8 1. a) Complete the table below. X1/ Xy/ 2 14...
TIL. PRE-LAB QUESTIONS - Experiment 8 1. a) Complete the table below. X1/ Xy/ 2 14 8 25 16 b) On graph paper plot y vs. x (appropriately labeling all axes as well as graphing the best fitting line/curve to the data points). c) Is the relationship between the y and x data pairs linear or non-linear? d) Is the relationship between the y and x data pairs direct or inverse? e) Which expression of k (k=y/x or k=xy) corresponds...
om 4. In the structural features of sw a welch of the following was to distinguish...
om 4. In the structural features of sw a welch of the following was to distinguish reducing monosaccharides freeding disaccharides? (a) Benedict's Test (e) ladine Test (b) Molisch Test (d) Barfoed's Test is indicate 3. In the Seliwanoll's test, a positive result for the presence of ketohexos what color? (a) purple (c) dark reddish brown (b) red-orange (d) greenish-blue 6. Vitamin C is also known as (a) sodium hydroxide (b) sulfuric acid (e) ascorbic acid (d) glucose 7. The oxidation...
PRE-LABORATORY QUESTIONS NAME: 1. According to the experimental procedure written above which cation in your sample...
PRE-LABORATORY QUESTIONS NAME: 1. According to the experimental procedure written above which cation in your sample should be identified first if it is indeed in the sample? 2. In what phase is the first cation supposed to be identified, in solid or liquid phase? And in what color? 3. According to the experimental procedure written above which cation in your sample should be identified second if it is indeed in the sample? 4. In what phase is the second cation...
Problems and questions 1. Is the following disaccharide a reducing sugar? Explain. сн-Oн OH OH OH о CH2OH ОН OH Он 2. The following test results were observed in a lab experiment: A reddish-orange solid with the Benedict' test A reddish precipitate with the Barfoed's test A red color within 1 minute with the Seliwanoff's test A yellow color with the iodine test Name the carbohydrate that you would expect to show these results. [Reminder: there is one more problem...
ne u ral features of car rots encruent, which of the following to distinguish reducing monosaccharides from reducing disaccharides? (a) Benedict's Test (c) Iodine Test (b) Molisch Test (d) Barfoed's Test for the m arketohexoses is indicated by 5. In the Seliwanoff's test, a positive what color? (a) purple (c) dark reddish brown (d) greenish-blue (b) red-orange 6. Vitamin C is also known as (a) sodium hydroxide (c) ascorbic acid (d) glucose (b) sulfuric acid 7. The oxidation of secondary...
2. Name the following alcoholis. ame: Cyclpentah Structure: Name: Structure: ОН CH, CH,CH,C- OH CH Name: Name: Structure: Structure: ОН Сн, он CH, -CH-CH2-CH, CH-CH, CH3 3. Write the product of the following oxidation reactions (if no reaction, write NR). CH, OH CH3-CH-CH, CH, CH-CH, +(0) — лон +(0) - Ketone CH, OH CH3 CH, CH, CH-CH-CH-CH, +(0) -OH + (0) 11-10 Experiment 11 Alcohols and Phenols Post-Lab Questions 1. Write the structures and classifications of the following alcohols: 2-bromo-3-pentanol...
CARBOHYDRATES POST-LAB QUESTIONS CONT'D 23.Draw the Haworth structure of lactose and explain why this disaccharide gives a positive Benedict's test; make sure to circle the part of the structure that is responsible for the reaction with Benedict's reagent. [5pts) Haworth Projection: (2.5 points) Hemiacetal circled / indicated (2.5 points) CARBOHYDRATES POST-LAB QUESTIONS CONT'D 24. When Benedict's reagent reacts with a reducing sugar, it oxidizes the aldehyde functional group to a carboxylic acid. As seen in the figure below: only a...
Please, fill in first table for Seliwanoff's Test for Ketoses.
Additional info is found in the images following table. (Second
table is info and image following).
Part C: Seliwanoff's Test for Ketoses Seliwanoff's Test Results Test Tube Sample Prediction Ketose? (Y/N) Observations Distilled water Peach / no change Glucose Peach to red slowly Fructose deep red solution very quickly Sucrose deep red solution quickly Lactose Peach to red slowly Starch Peach to red very slowly Mystery sample Peach to red...
14. Lab Exercise 5-1 is an interesting way to run these test tube experiments without oxygen - seal the tube with a layer of clear mineral oil on top (see the figure in the manual). Based on this figure and the Table of Results for this experiment, if the sealed tube is all green or slightly blue but the unsealed tube has any amount of yellow, what type of energy metabolism does that organism have? a. Oxidative only b. Oxidative...
TIL. PRE-LAB QUESTIONS - Experiment 8 1. a) Complete the table below. X1/ Xy/ 2 14 8 25 16 b) On graph paper plot y vs. x (appropriately labeling all axes as well as graphing the best fitting line/curve to the data points). c) Is the relationship between the y and x data pairs linear or non-linear? d) Is the relationship between the y and x data pairs direct or inverse? e) Which expression of k (k=y/x or k=xy) corresponds...
om 4. In the structural features of sw a welch of the following was to distinguish reducing monosaccharides freeding disaccharides? (a) Benedict's Test (e) ladine Test (b) Molisch Test (d) Barfoed's Test is indicate 3. In the Seliwanoll's test, a positive result for the presence of ketohexos what color? (a) purple (c) dark reddish brown (b) red-orange (d) greenish-blue 6. Vitamin C is also known as (a) sodium hydroxide (b) sulfuric acid (e) ascorbic acid (d) glucose 7. The oxidation...
PRE-LABORATORY QUESTIONS NAME: 1. According to the experimental procedure written above which cation in your sample should be identified first if it is indeed in the sample? 2. In what phase is the first cation supposed to be identified, in solid or liquid phase? And in what color? 3. According to the experimental procedure written above which cation in your sample should be identified second if it is indeed in the sample? 4. In what phase is the second cation...
Most questions answered within 3 hours.
-
You plan to save $5,700 per year for the next 10 years. After
the last deposit,...
asked 13 minutes ago -
On January 1, 2019, ABC Corp. borrowed $81,000 by signing an
installment loan. The loan will be...
asked 17 minutes ago -
Enzyme X exhibits maximum activity at pH = 5.25. X shows a sharp
decrease in its...
asked 32 minutes ago -
Postulate a reason for why so many aliphatic amino acids are
essential.
asked 31 minutes ago -
Three samples were taken of 4 different dog food bags and their
weights were recorded:
Sample/Observation...
asked 35 minutes ago -
The Beatles had 27 number one hits; a radio station asks
listeners to send in a...
asked 33 minutes ago -
Help with Java Program Please
Create a simple graph class. The graph class should have the...
asked 33 minutes ago -
Which of the following statements is true regarding the nature
of culture?
A.We are born with...
asked 54 minutes ago -
(a) 2
NO2(g) à 2
NO(g) +
O2(g)
The rate law for this reaction
is 2nd...
asked 57 minutes ago -
Write the overall reaction for the RedOx
reaction (below) when it occurs in an acidic environment....
asked 1 hour ago -
Two forces are acting on an object. Force 1 on the object is 6.0
N and...
asked 1 hour ago -
You are planning for retirement. You plan to work for 20 years.
Starting a year from...
asked 1 hour ago