Q1. [2] § 5.2.2 Heterotrophic Nutrition § 5.2.3 How do Organisms obtain their Nutrition? § 5.2.4 Nutrition in Human Beings
In the process of digestion of food in human beings, two protein-digesting enzymes are secreted. Name the enzymes along with the glands that secrete them.
Previously asked in CBSE board exam
2023 31/5/1 Q24
Generated by claude-sonnet-4-6 · 2026-06-11 09:49 · grounding rag
Model Answer
Two protein-digesting enzymes secreted during digestion:
- Pepsin — secreted by the gastric glands present in the walls of the stomach.
- Trypsin — secreted by the pancreas (in pancreatic juice) into the small intestine.
Source: Life Processes, Section 5.2.4
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Explanation
The question specifically asks for protein-digesting enzymes, so do not include salivary amylase (digests starch) or lipase (digests fats). Examiners expect both the enzyme name and the secreting gland for full marks — one mark per enzyme-gland pair. Note that intestinal juice also converts proteins to amino acids, but the question asks for named enzymes with named glands; pepsin + gastric glands and trypsin + pancreas are the clearest, textbook-stated pairs.
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