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.
Ch.6 Carbohydrates Life's Sweet Molecules
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696Not the one you use?Change textbook
Chapter 3, Problem 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.
Verified step by step guidance1
Identify the amount of digestible carbohydrate consumed, which is 50 g.
Recall that carbohydrates provide 4 Calories of energy per gram.
Calculate the total energy produced by multiplying the grams of carbohydrate by the energy provided per gram: 50 g * 4 Cal/g.
Determine the total energy produced in Calories from the carbohydrates.
Calculate the percentage of a 2200 Calorie diet that the energy from carbohydrates represents by dividing the energy from carbohydrates by 2200 Calories and multiplying by 100.

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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Energy from Carbohydrates
Carbohydrates are a primary source of energy for the body, providing approximately four Calories per gram. When consumed, they are broken down into glucose, which is utilized by cells for energy. Understanding this conversion is essential for calculating the total energy produced from a given amount of carbohydrates.
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Caloric Intake and Diet Composition
A typical diet is often measured in Calories, which represent the energy content of food. In this context, a 2200 Calorie diet serves as a reference point for evaluating the contribution of carbohydrates to overall energy intake. Knowing the percentage of calories from carbohydrates helps assess dietary balance and nutritional adequacy.
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Calculating Percentages
Calculating percentages is a fundamental mathematical skill used to express a part of a whole. In this scenario, determining what percent of a 2200 Calorie diet is made up of the energy from 50 g of carbohydrates involves dividing the energy derived from carbohydrates by the total caloric intake and multiplying by 100. This calculation is crucial for understanding the role of carbohydrates in the diet.
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Related Practice
Textbook Question
Textbook Question
D-Fructose can also form a six-membered ring. Draw the β anomer of D-fructose in the six-membered ring form.
Textbook Question
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.
Textbook Question
Which of the components in starch is more likely to be broken down more quickly in plants, amylose or amylopectin? Why?
Textbook Question
Trehalose is a naturally occurring disaccharide used in cosmetics because of its ability to retain moisture. The formal name of trehalose is glucose α, α(1→1) glucose. Draw the structure of trehalose. Is it a reducing or nonreducing sugar?
