If you chew on a piece of bread long enough, it will begin to taste sweet because

Options

A. The sugar contents are drawn out
B. Ptyline converts starch into maltose
C. It does not taste sweet
D. The taste buds are stimulated by chewing

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks why chewing on a piece of bread for a long time leads to a sweet taste.

2. **Role of Salivary Glands**: When we chew food, our salivary glands produce saliva. This saliva is essential for the digestion of food.

3. **Presence of Salivary Amylase**: Saliva contains an enzyme called salivary amylase (also known as ptyalin). This enzyme plays a crucial role in breaking down carbohydrates.

4. **Carbohydrates in Bread**: Bread primarily contains starch, which is a complex carbohydrate (polysaccharide).

5. **Conversion of Starch**: Salivary amylase begins to break down starch into simpler carbohydrates. It converts starch into dextrin and maltose, which are simpler sugars.

6. **Sweet Taste**: As the starch is broken down into these simpler sugars, the sweetness of the bread becomes more pronounced. This is why after chewing for a while, the bread starts to taste sweet.

7. **Conclusion**: The sweet taste experienced after chewing bread is due to the action of salivary amylase converting starch into maltose and dextrin.

**Final Answer**: If you chew on a piece of bread long enough, it will begin to taste sweet because salivary amylase in saliva converts the starch in the bread into simpler sugars like maltose.

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