Which of the following sugars would NOT yield a positive Fehling's test (red color change)? Which...
Which of the following sugars would NOT yield a positive Fehling's test (red color change)? Which of the following sugars would NOT yield a positive Fehling's test (red color change)?
lactose
maltose
sucrose
All of the listed responses would yield a positive result.
Homework Answers
Fehling's test is used to test between reducing and non reducing sugars.
Reducing sugar gives positive response while non reducing sugar gives negative response.
From the given disaccharides, maltose and lactose are reducing sugars and give positive response. Sucrose is a non reducing sugar. Hence, it will give negative response with Fehling's solution.
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Which of the following sugars would NOT yield a positive
Fehling's test (red color change)? Which...
yellow, green or red, the test is positive. The color of the solution depends on the...
yellow, green or red, the test is positive. The color of the solution depends on the concentration of 3. Observe the color of your negative and positive controls. Note which one has a red color. 4 After the dialysis of the NaCi-elucose-red dye solution has progressed for an hour, test the water outside the dialysis bag (your experimental data) for the presence of Ci and glucose same way you did for your controls in steps 1 and 2. Observe if...
2. Indicate whether the followin g carbohydrates will give a positive (+) or a negative (...
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Methy red test when the result is positive and color red, what's the result chemically?
Methy red test when the result is positive and color red, what's the result chemically?
A positive PDase test will result in what color change in the media when the appropriate...
A positive PDase test will result in what color change in the media when the appropriate reagent is added? If fermentation occurs in the phenol-red carbohydrate fermentation broth the media will turn what color?
1. Which of the following gives a positive Benedict’s test? Explain.
Which of the following gives a positive Benedict's test? Explaina. Maltoseb. Sucrosec. Glycogend. Cellulose
Paragraph Styles Part A observations (salution appearance, test strip colors, etc.) Test tube Glu...
carbohydrates and enzymes post lab questions
Paragraph Styles Part A observations (salution appearance, test strip colors, etc.) Test tube Glucose levels Initial: 1700 mg/dLInitial: Dark brown Final:1700 mg/dL Final: Dark brown (glucose) Initial:80 mg/dL Initial: light blue with a very slight light green tint M Final: 250 mg/dL Final: Light green (maltose) Initial: 0 mg/dL Initial: light blue Final:250 mg/dL Final: light green (lactose) Initial:0 mg/dL Initial: light blue Final:260 mg/d Final: light green (lactose, acidic) Initial:0 mg/dL Initial: light...
help! Question 1 (1.25 points) Which of the following carbohydrates contain ketohexoses? (Select all that apply.)...
help!
Question 1 (1.25 points) Which of the following carbohydrates contain ketohexoses? (Select all that apply.) Sucrose Fructose Lactose Starch Cellulose Question 2 (1.25 points) Which of the following functional groups in a carbohydrate are able to be oxidized to carboxylic acids? (Select all that apply.) Alcohols Ketones that are rearranged in solution. Aldehydes Ketones that are not rearranged in solution. Question 3 (1.25 points) Which of the following carbohydrates were reducing sugars? (Select all that apply.) Sucrose Cellulose Starch...
Report Sheet Carbohydrates Results of Carbohydrate Tests D. Benedict's Test E. Seliwano T Glucose e rmentation...
Report Sheet Carbohydrates Results of Carbohydrate Tests D. Benedict's Test E. Seliwano T Glucose e rmentation Test G. Todine Test Fructose Sucrose Lactose Starch Water Questions and Problems 0.6 From the results above, list the sugars that are reducing sugars and those that are not Reducing sugars Nonreducing sugars Q.7 What sugars are ketoses? Q.8 What sugars give a positive fermentation test? Q.9 Which carbohydrates give a blue-black color in the iodine test?
Microbiology ONLY answe 1 2 3 4 5 6 Which reagent is added to test for...
Microbiology
ONLY answe
1
2
3
4
5
6
Which reagent is added to test for indole? A“positive” lactose test is yellow. What is present in the medium that causes the color change? You added methyl red to your MR test and observe a red color. The test result can be interpreted as You forgot to label a tube with a slant but you remember that its original color was green and now after incubation, the slant color is blue....
Which simple sugars (monosaccharides) are contained in each of the following: sucrose Starch Glycogen cellulose lactose
Which simple sugars (monosaccharides) are contained in each of the following: sucrose Starch Glycogen cellulose lactose
yellow, green or red, the test is positive. The color of the solution depends on the concentration of 3. Observe the color of your negative and positive controls. Note which one has a red color. 4 After the dialysis of the NaCi-elucose-red dye solution has progressed for an hour, test the water outside the dialysis bag (your experimental data) for the presence of Ci and glucose same way you did for your controls in steps 1 and 2. Observe if...
2. Indicate whether the followin g carbohydrates will give a positive (+) or a negative ( -) result with each test listed below Benedict's test Seliwanoff's test Fermentation test lodine test glucose fructose galactose sucrose lactose maltose amylose amylopectin
A positive PDase test will result in what color change in the media when the appropriate reagent is added? If fermentation occurs in the phenol-red carbohydrate fermentation broth the media will turn what color?
carbohydrates and enzymes post lab questions
Paragraph Styles Part A observations (salution appearance, test strip colors, etc.) Test tube Glucose levels Initial: 1700 mg/dLInitial: Dark brown Final:1700 mg/dL Final: Dark brown (glucose) Initial:80 mg/dL Initial: light blue with a very slight light green tint M Final: 250 mg/dL Final: Light green (maltose) Initial: 0 mg/dL Initial: light blue Final:250 mg/dL Final: light green (lactose) Initial:0 mg/dL Initial: light blue Final:260 mg/d Final: light green (lactose, acidic) Initial:0 mg/dL Initial: light...
help!
Question 1 (1.25 points) Which of the following carbohydrates contain ketohexoses? (Select all that apply.) Sucrose Fructose Lactose Starch Cellulose Question 2 (1.25 points) Which of the following functional groups in a carbohydrate are able to be oxidized to carboxylic acids? (Select all that apply.) Alcohols Ketones that are rearranged in solution. Aldehydes Ketones that are not rearranged in solution. Question 3 (1.25 points) Which of the following carbohydrates were reducing sugars? (Select all that apply.) Sucrose Cellulose Starch...
Report Sheet Carbohydrates Results of Carbohydrate Tests D. Benedict's Test E. Seliwano T Glucose e rmentation Test G. Todine Test Fructose Sucrose Lactose Starch Water Questions and Problems 0.6 From the results above, list the sugars that are reducing sugars and those that are not Reducing sugars Nonreducing sugars Q.7 What sugars are ketoses? Q.8 What sugars give a positive fermentation test? Q.9 Which carbohydrates give a blue-black color in the iodine test?
Microbiology
ONLY answe
1
2
3
4
5
6
Which reagent is added to test for indole? A“positive” lactose test is yellow. What is present in the medium that causes the color change? You added methyl red to your MR test and observe a red color. The test result can be interpreted as You forgot to label a tube with a slant but you remember that its original color was green and now after incubation, the slant color is blue....
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