Question 2: In which of the following groups of organisms, food material is broken down outside the body and absorbed?
Explanation: These are saprotrophs, and digestion in saprotrophs takes place before ingestion.
Question 3: Select the correct statement
Explanation: Other options show features of autotrophic nutrition.
Question 4: Which is the correct sequence of parts in human alimentary canal?
Question 5: If salivary amylase is lacking in the saliva, which of the following events in the mouth cavity will be affected?
Explanation: Salivary amylase digests starch. Hence, its absence will hamper digestion of starch.
Question 6: The inner lining of stomach is protected by one of the following from hydrochloric acid. Choose the correct one
Question 7: Which part of alimentary canal receives bile from the liver?
Explanation: Bile comes to the small intestine through hepato-pancreatic duct.
Question 8: A few drops of iodine solution were added to rice water. The solution turned blue-black in colour. This indicates that rice water contains
Explanation: Starch makes a dark blue complex with iodine.
Question 9: In which part of the alimentary canal food is finally digested?
Explanation: Major part of digestion takes place in small intestine, where digestion is completed. Digestion of starch takes place in mouth. Partial digestion of protein takes place in stomach. No digestion takes place in large intestine.
Question 10: Choose the function of the pancreatic juice from the following
Question 11: When air is blown from mouth into a test-tube (containing lime water), the lime water turned milky due to the presence of
Explanation: Carbon dioxide reacts with limewater to form calcium carbonate. Insoluble calcium carbonate is responsible for appearance of white colour.
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