CIE iGCSE Co-Ordinated Science B7.2 Digestive system Exam Style Questions Paper 1
▶️ Answer/Explanation
The alimentary canal is the pathway through which food passes. Food enters through the mouth and leaves through the anus.
The stomach and intestines are in between, but the question asks for the first and last organs. Therefore, the correct route is B.
✅ Answer: (B)
The stomach and intestines are in between, but the question asks for the first and last organs. Therefore, the correct route is B.
✅ Answer: (B)
▶️ Answer/Explanation
The alimentary canal follows the order: mouth → oesophagus → stomach → small intestine → large intestine → rectum → anus.
After passing through the small intestine, undigested food enters the large intestine, where water is absorbed and faeces are formed.
✅ Answer: (B)
After passing through the small intestine, undigested food enters the large intestine, where water is absorbed and faeces are formed.
✅ Answer: (B)
▶️ Answer/Explanation
The iodine test turning blue-black is a positive result specifically for starch; the Benedict’s test (negative, stays blue) rules out reducing sugars, and the Biuret test (negative, stays blue) rules out protein.
Since the emulsion/grease-spot test for fats also appears negative in the table, starch is the only nutrient confirmed present by this positive iodine result.
✅ Answer: (C)
Since the emulsion/grease-spot test for fats also appears negative in the table, starch is the only nutrient confirmed present by this positive iodine result.
✅ Answer: (C)
▶️ Answer/Explanation
The stomach is the wide, J-shaped sac just after the oesophagus.
The liver is the large organ above and to the side of the stomach, while the pancreas lies behind the stomach near the small intestine.
Matching each labelled structure to its position in the alimentary canal gives the correct set for liver, pancreas and stomach.
✅ Answer: (D)
The liver is the large organ above and to the side of the stomach, while the pancreas lies behind the stomach near the small intestine.
Matching each labelled structure to its position in the alimentary canal gives the correct set for liver, pancreas and stomach.
✅ Answer: (D)
▶️ Answer/Explanation
Following the alimentary canal in order from the mouth: food passes down the oesophagus (P), into the coiled small intestine (Q), and finally the large intestine (R) before the anus.
This sequence and structure shape matches row D.
✅ Answer: (D)
This sequence and structure shape matches row D.
✅ Answer: (D)