뒤로
문제 47a
Explain whether the following blood types could be donated to a person with type B blood:
(a) A
문제 49
How is the polysaccharide heparin different from the glucose polysaccharides?
문제 51
Write the molecular formula for a carbohydrate containing three carbons.
문제 52
What would be the molecular formula of a monosaccharide characterized as an aldopentose?
문제 53
Explain the difference between an oligosaccharide and a polysaccharide.
문제 54
Explain the difference between an aldose and a ketose.
문제 55
Describe the properties of soluble fiber.
문제 57
Name the functional groups present in aldoses.
문제 63a
How are the following pairs of carbohydrates, shown in a Fischer projection, related to each other? Are they structural isomers, enantiomers, diastereomers, or epimers? Identify each as the D- or L-isomer.
(a)
문제 63b
How are the following pairs of carbohydrates, shown in a Fischer projection, related to each other? Are they structural isomers, enantiomers, diastereomers, or epimers? Identify each as the D- or L-isomer.
(b)
문제 64a
How are the following pairs of carbohydrates, shown in a Fischer projection, related to each other? Are they structural isomers, enantiomers, diastereomers, or epimers?
(a)
문제 65
Draw the Fischer projection of the C3 epimer of D-glucose. Compare your structure with those in Table 6.1 and give the name of this compound.
문제 67a
Identify the following carbohydrates as the ⍺ or β anomer:
(a)
문제 68b
Identify the following carbohydrates as the ⍺ or β anomer:
(b)
문제 71
Draw the Fischer projection of the product of the oxidation of D-galactose at C1.
문제 73
Draw the Fischer projection of the product of reduction reaction of D-galactose at C1.
문제 75a
Will the following carbohydrates produce a positive Benedict's test?
a. D-glucose
문제 75b
Will the following carbohydrates produce a positive Benedict’s test?
b. lactose
문제 77
Draw the product of the following 1→4 condensation and name the glycosidic bond:
문제 79
Isomaltose, a disaccharide formed during caramelization in cooking, contains two glucose units bonded ⍺(1→6). Draw the structure of isomaltose.
문제 80
The glycosidic bond in a disaccharide was determined to be α(1→6). Hydrolysis of the disaccharide produced one galactose and one fructose. Draw the structure of the disaccharide.
문제 82
Our bodies cannot digest cellulose because we lack the enzyme cellulase. Why is cellulose an important part of a healthy diet if we cannot digest it?
문제 83
The shell of a shrimp is composed of chitin. If you eat a boiled shrimp without removing the shell, will your body break the shell down into its component sugars? Explain. (Hint: Compare chitin’s structure to that of amylose and cellulose.)
문제 84
Glycogen and amylopectin are both branched polymers of glucose. Read the descriptions of each in Section 6.6. Which molecule has a more compact structure? Explain.
문제 87
On an exam, a student was asked to draw the Fischer projection of L-glucose, but he had only memorized the structure of D-glucose. He wrote the structure of D-glucose and switched the hydroxyl group on C5 from the right to the left. Was his answer correct? If not, what is the name of the aldose that he drew?
문제 88
Carbohydrates are abbreviated using a three-letter abbreviation followed by their glycosidic bond type. For example, maltose and sucrose can be written respectively as
Provide the structure for the O-type blood carbohydrate set given the following abbreviation:
L-Fucα (1→2) Galß(1→4)GlcNAc
문제 89a
The structure of sucralose, found in the artificial sweetener Splenda, is shown in the figure. It consists of a chlorinated disaccharide made up of galactose and fructose. In its structure shown,
(a) identify the galactose unit and the fructose unit.
문제 89b
The structure of sucralose, found in the artificial sweetener Splenda, is shown in the figure. It consists of a chlorinated disaccharide made up of galactose and fructose. In its structure shown, (b) identify the type of glycosidic bond present.
문제 90
Which of the components in starch is more likely to be broken down more quickly in plants, amylose or amylopectin? Why?
문제 91
How much energy is produced if a person eats 50 g of digestible carbohydrate (not fiber) in a day? In this case, what percent of a 2200 Calorie diet would be digestible carbohydrate? Recall that carbohydrates provide four Calories of energy per gram consumed.
