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Question

When a piece of bread is chewed, it tastes sweet because

A
the sugar contents are drawn out.
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B
saliva converts starch into maltose.
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C
the taste buds are stimulated by chewing.
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D
saliva converts starch into glucose.
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Solution

The correct option is option (B):

Explanation for the correct option:

  1. Saliva is secreted by the salivary glands present in the mouth.
  2. Saliva contains a digestive enzyme called salivary amylase.
  3. Salivary amylase converts the starch present in the food into maltose.
  4. Maltose is a sugar which is sweet in taste.
  5. Hence saliva converts starch into maltose while chewing the piece of bread.

Final answer: When a piece of bread is chewed, it tastes sweet because saliva converts starch into maltose.


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