Question

the picture represents a protein in the stomach being broken down into individual amino acids. which is mixed with proteins to break them into amino acids?
○ villi
○ enzymes
○ saliva
○ fat

Explanation:

To determine which substance breaks proteins into amino acids, we analyze each option:

• Villi are finger - like projections in the small intestine for nutrient absorption, not for breaking down proteins.
• Enzymes (like proteases) are biological catalysts that speed up the chemical reaction of breaking proteins into amino acids during digestion.
• Saliva contains amylase which acts on starch, not proteins.
• Fat is a different macronutrient and does not break down proteins.

Answer:

B. enzymes