(a) State the role of enzymes in digestion. [2] (b) Name the enzyme that breaks down protein in the stomach. [1] (c) Explain why the body needs different en...
Question 1 Report
(a) State the role of enzymes in digestion. [2]
(b) Name the enzyme that breaks down protein in the stomach. [1]
(c) Explain why the body needs different enzymes to digest different nutrients. [3]
Answer Details
(a) State the role of enzymes in digestion. [2]
- Enzymes are biological catalysts (1) that speed up the chemical reactions that break down food into smaller molecules (1).
(b) Name the enzyme that breaks down protein in the stomach. [1]
- Pepsin (1)
(c) Explain why different enzymes are needed. [3]
One mark for each valid point (max 3):
- Each enzyme is specific and can only work on one type of food molecule (1)
- For example, amylase breaks down starch but cannot break down protein or fat (1)
- Different enzymes work best at different pH levels, which is why the stomach is acidic and the small intestine is alkaline (1)
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