Digestive System and Carbohydrates Quiz

What is the primary function of the digestive system?

• To filter waste from the blood

• To produce hormones

• To transport oxygen to cells

• To break down food into smaller, soluble molecules

Which of the following is a polymer of glucose?

• Starch

• Amino acids

• Lipids

• Proteins

What is the storage form of carbohydrate in animals?

• Starch

• Cellulose

• Glycogen

• Sucrose

Which test is used to detect the presence of reducing sugars?

• Benedict's test

• Iodine test

• Biuret test

• Sudan III test

What color change indicates the presence of starch when using iodine solution?

• Red-brown

• Blue-black

• Green

• Yellow

Which of the following is NOT a reducing sugar?

• Glucose

• Fructose

• Sucrose

• Lactose

What safety precaution should be taken when using Benedict's solution?

• Wear safety goggles

• Use a fume hood

• Avoid using near open flames

• Wear gloves

What is the main component of plant cell walls?

• Cellulose

• Starch

• Glycogen

• Chitin

Which enzyme is responsible for breaking down starch into maltose?

• Amylase

• Protease

• Lipase

• Lactase

What is the role of cellulose in the human diet?

• Fat storage

• Energy source

• Dietary fiber

• Protein synthesis