Multiple Choice
Which part of the digestive system contains villi that increase the surface area for absorption?
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23. The Digestive System
Introduction to the Digestive System
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Which of the following is true about digestive enzymes?
A
They are lipids that emulsify fats in the stomach.
B
They are carbohydrates that break down proteins into amino acids.
C
They are nucleic acids that digest vitamins and minerals.
D
They are proteins that catalyze chemical reactions in the digestive tract.
Verified step by step guidance1
Understand the role of digestive enzymes: Digestive enzymes are crucial for breaking down food into smaller, absorbable components. They facilitate chemical reactions in the digestive tract.
Identify the nature of digestive enzymes: Digestive enzymes are proteins. Proteins are composed of amino acids and have specific functions, including catalyzing reactions.
Clarify the function of digestive enzymes: These enzymes speed up the chemical reactions necessary for digestion, such as breaking down carbohydrates, proteins, and fats into their simpler forms.
Differentiate digestive enzymes from other biomolecules: Unlike lipids, carbohydrates, or nucleic acids, proteins serve as enzymes due to their ability to lower activation energy and increase reaction rates.
Recognize the correct statement: The statement 'They are proteins that catalyze chemical reactions in the digestive tract' accurately describes the nature and function of digestive enzymes.
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