Glucose, Sucrose, Fructose, and Amylose. Which is expected to form a blue/black color when mixed with...
Glucose, Sucrose, Fructose, and Amylose. Which is expected to form a blue/black color when mixed with the Iodine reagent, and why?
Homework Answers
Amylose is a poly saccharide which is a polymer of alpha-D-Glucose. They are present as tight coiled spirals. When yellow Brown Iodine reagent is added to the Amylose coil it forms a deep blue-black colour which is due to complex formattion between OH's Present inside amylose coil and Iodine. Whereas when Glucose , Sucrose and Fructose on treating with Iodine reagent the colour of the reagent remains as such because of no complex formattion as in Amylose.
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Glucose, Sucrose, Fructose, and Amylose. Which is expected to
form a blue/black color when mixed with...
When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly...
When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly disappears. This is due to the formation of which molecule? * glucose O glycogen sucrose O maltose
The enzyme sucrase… A. joins sucrose to fructose to form glucose. B. does not affect the...
The enzyme sucrase… A. joins sucrose to fructose to form glucose. B. does not affect the energy of activation in the reaction it catalyzes. C. breaks the bond between sucrose and fructose to produce glucose. D. breaks the bond between two glucose monomers. E. generates both glucose and fructose from sucrose.
answers for the upcoming homework should be among sucrose, glucose, starch, fructose and lactose. Results for...
answers for the upcoming homework should be among
sucrose, glucose, starch, fructose and lactose.
Results for Unknowns. Unknown A Benedict's Test: Bluish color Seliwanof's Test: Red Fermentation Test: Bubbles Iodine Test: no color change Unknown A is because Unknown C Benedict's Test: Red-orange precipitatc Seliwanoff's Test: no color change Fermentation Test: Bubbles lodine Test: no color change Unknown C is because Unknown E Benedict's Test: Blue-green color Seliwanoff's Test: no color change Fermentation Test: Bubbles lodine Test: Purple/Black color Unknown...
5. Iodine reacts with starch to form a blue-colored complex. Explain the results of the iodine...
5. Iodine reacts with starch to form a blue-colored complex. Explain the results of the iodine test with the hydrolyzed starch solution. 6. Sucrose differs from honey in that honey is a mixture of glucose and fructose. Sucrose is a dis- accharide made up of them. Explain why honey is a quicker source of energy than sucrose.
Sucrose decomposes to fructose and glucose in acid solution. When In (sucrose) is plotted vs. time,...
Sucrose decomposes to fructose and glucose in acid solution. When In (sucrose) is plotted vs. time, a straight line with slope of -0 208 hr results. What is the rate law for the reaction? Rate = 0.208 hr(sucrose) ob Rate = 0.208 hr [sucrose) Woc Rate = 0,0433 hr (sucrose d Rate = 0.0433 hr (sucrose] O Rate = 0.208 mol L-Throucrosojº
4. Sucrose or common sugar (C12H22011) is hydrolyzed with water to form fructose (CeH120) and glucose...
4. Sucrose or common sugar (C12H22011) is hydrolyzed with water to form fructose (CeH120) and glucose (CoH1206). The mix of fructose and glucose is known as inverted sugar and it is very important because it does not crystallize, so soft candies can be produced. From the following kinetic data, determine: 0 60 Reaction time (min) 96.4 157.5 [C12H22O11] (mol L.) a) The order of the reaction; b) Time required for 50% of sucrose to hydrolyze; e) For an ideal perfect...
Q2 From the results in Part B, which carbohydrates are ketoses? Fructose Q3 From the results...
Q2 From the results in Part B, which carbohydrates are ketoses? Fructose Q3 From the results in Part C, which carbohydrates give a positive fermentation test? Q4 From the results in Part D, which carbohydrates give a blue-black color in the iodine test? Identifying an Unknown Carbohydrate Unknown No. X Carbohydrates Present Results with Unknown Blue Benedict's (A) Seliwanoff's (B) Fermentation (C) Times Nev - 12 BI er Red Bubble Iodine (D) Yellow What carbohydrate(s) is/are in your unknown? Sucrose...
What Was - starch hydrolysis results in formation of Formed glucose, fructose etc. based on the...
What Was - starch hydrolysis results in formation of Formed glucose, fructose etc. based on the enzym Upon I mode of action. The color of Fehlings Digestion? sovhon turns to yedbi cause the Sugarne - copped (11) to copper in fenungs sowho PROBLEMS 1. What purpose does amylase serve in the hydrolysis of starch? Why did the color of the iodine test change over time? Be specific about the reaction that is occurring (substrate and product). 2. Should there be...
1. Show the chemical reaction that takes place when Benedict's reagent (Cu") reacts with glucose (use...
1. Show the chemical reaction that takes place when Benedict's reagent (Cu") reacts with glucose (use open chain Fisher projection). 2. Do you expect fructose to give a positive reaction with Barfoed's reagent? Explain why or why not. Indicate which of the test carbohydrates (glucose, fructose, lactose, sucrose, starch) would give 5- hydroxymethylfurfural when heated with hydrochloric acid. (See description of reactions for Barfoed's reagent and Seliwanoffs reagent). 3. 121
Reducing and Nonreducing Carbohydrates 6. Carbohydrate Color after Benediet's AssayReducing or Nonreducing? 1-starch 2-sucrose 3-lactose 4-glucose...
Reducing and Nonreducing Carbohydrates 6. Carbohydrate Color after Benediet's AssayReducing or Nonreducing? 1-starch 2-sucrose 3-lactose 4-glucose 5-fructose Starch Hydrolysis: Enzyme vs. Acid Catalysis Color of Iodine Test (none, some, or a lot) (no, somewhat, or completely) Is Intact Starch Still Present? Was Hydrolysis Successful? Catalyst Used KI sol'n only NONE N/A (negative control) 1-acid 2-enzyme nore→ Exp 10 Carbohydrates-page 13
When starch and amylase are mixed in the presence of iodine solution, the blue-black colour rapidly disappears. This is due to the formation of which molecule? * glucose O glycogen sucrose O maltose
answers for the upcoming homework should be among
sucrose, glucose, starch, fructose and lactose.
Results for Unknowns. Unknown A Benedict's Test: Bluish color Seliwanof's Test: Red Fermentation Test: Bubbles Iodine Test: no color change Unknown A is because Unknown C Benedict's Test: Red-orange precipitatc Seliwanoff's Test: no color change Fermentation Test: Bubbles lodine Test: no color change Unknown C is because Unknown E Benedict's Test: Blue-green color Seliwanoff's Test: no color change Fermentation Test: Bubbles lodine Test: Purple/Black color Unknown...
5. Iodine reacts with starch to form a blue-colored complex. Explain the results of the iodine test with the hydrolyzed starch solution. 6. Sucrose differs from honey in that honey is a mixture of glucose and fructose. Sucrose is a dis- accharide made up of them. Explain why honey is a quicker source of energy than sucrose.
Sucrose decomposes to fructose and glucose in acid solution. When In (sucrose) is plotted vs. time, a straight line with slope of -0 208 hr results. What is the rate law for the reaction? Rate = 0.208 hr(sucrose) ob Rate = 0.208 hr [sucrose) Woc Rate = 0,0433 hr (sucrose d Rate = 0.0433 hr (sucrose] O Rate = 0.208 mol L-Throucrosojº
4. Sucrose or common sugar (C12H22011) is hydrolyzed with water to form fructose (CeH120) and glucose (CoH1206). The mix of fructose and glucose is known as inverted sugar and it is very important because it does not crystallize, so soft candies can be produced. From the following kinetic data, determine: 0 60 Reaction time (min) 96.4 157.5 [C12H22O11] (mol L.) a) The order of the reaction; b) Time required for 50% of sucrose to hydrolyze; e) For an ideal perfect...
Q2 From the results in Part B, which carbohydrates are ketoses? Fructose Q3 From the results in Part C, which carbohydrates give a positive fermentation test? Q4 From the results in Part D, which carbohydrates give a blue-black color in the iodine test? Identifying an Unknown Carbohydrate Unknown No. X Carbohydrates Present Results with Unknown Blue Benedict's (A) Seliwanoff's (B) Fermentation (C) Times Nev - 12 BI er Red Bubble Iodine (D) Yellow What carbohydrate(s) is/are in your unknown? Sucrose...
What Was - starch hydrolysis results in formation of Formed glucose, fructose etc. based on the enzym Upon I mode of action. The color of Fehlings Digestion? sovhon turns to yedbi cause the Sugarne - copped (11) to copper in fenungs sowho PROBLEMS 1. What purpose does amylase serve in the hydrolysis of starch? Why did the color of the iodine test change over time? Be specific about the reaction that is occurring (substrate and product). 2. Should there be...
1. Show the chemical reaction that takes place when Benedict's reagent (Cu") reacts with glucose (use open chain Fisher projection). 2. Do you expect fructose to give a positive reaction with Barfoed's reagent? Explain why or why not. Indicate which of the test carbohydrates (glucose, fructose, lactose, sucrose, starch) would give 5- hydroxymethylfurfural when heated with hydrochloric acid. (See description of reactions for Barfoed's reagent and Seliwanoffs reagent). 3. 121
Reducing and Nonreducing Carbohydrates 6. Carbohydrate Color after Benediet's AssayReducing or Nonreducing? 1-starch 2-sucrose 3-lactose 4-glucose 5-fructose Starch Hydrolysis: Enzyme vs. Acid Catalysis Color of Iodine Test (none, some, or a lot) (no, somewhat, or completely) Is Intact Starch Still Present? Was Hydrolysis Successful? Catalyst Used KI sol'n only NONE N/A (negative control) 1-acid 2-enzyme nore→ Exp 10 Carbohydrates-page 13
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