Chapter 35, Problem 17A

Summary Introduction

Introduction:

Carbohydrates are found in many forms in our food like glucose, fructose, and sucrose. These are simple carbohydrates that are found in fruits, candies, and soda pop but there is also some complex sugar such as starch that consists of a long chain of sugar. In the digestive tract, the complex sugar is break-down into simple sugar before digestion. The simple sugar that is formed is absorbed by the small intestine and release to the bloodstream. Some of the carbohydrates come in fiber forms that are not digestible but important for our diet.

Answer to Problem 17A

Correct answer :

The correct answer is option (D) cellulose.

Explanation of Solution

Explanation/justification for the correct answer :

Option (D) cellulose. Cellulose is a carbohydrate found in plants. Cellulose is sometimes found as dietary fibers and the fibers cannot be digested by humans but the consumption of fibers is important as it allows the food to move through the digestive tract and also help to eliminate the wastes. So, this is the correct answer.

Explanation for incorrect answer :

Option (A) sucrose. Sucrose is found in fruits and other food items. It is digestible and not found in forms of fiber rather it is found in simple sugar form. So, this is an incorrect option.

Option (B) starch. Starch is found in the form of energy in plants and when we consume the food we eat most of the starch part and it is digestible. So, this is an incorrect answer.

Option (C) glycogen. Glycogen is also digestible and not found in a fiber form. So, this is an incorrect answer.