2. Cell Chemistry & Cell Components

Carbohydrates

Open Question
Lysozyme, an enzyme found in human saliva, tears, and other secretions, catalyzes the hydrolysis of the ββ-1,4-glycosidic linkages in peptidoglycan. Predict the effect of this enzyme on bacteria and how it may be involved in human health.
Open Question
Galactosemia is a potentially fatal disease that occurs in humans who lack the enzyme that converts galactose to glucose. If you were a physician treating a person with this disease, which of the following would you have them exclude from their diet?a. maltoseb. starchc. mannosed. lactose
Open Question
Sucrose is broken down in your intestine to the monosaccharides glucose and fructose, which are then absorbed into your blood. What is the name of this type of reaction? Using this diagram of sucrose, show how this would occur.
Open Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

a. Carbohydrates are the main source of fuel for the human body.
Open Question
Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

b. The main storage form of glucose in the human body is starch.
Open Question
The polysaccharide cellulose is not digestible by humans, as we lack the enzyme cellulase, which is required to break it down. Certain dietary supplements contain the enzyme cellulase and claim that being able to break down cellulose will help a person lose weight. But what do you think would happen if we could digest the cellulose we ate?