The amount of starch that is normally hydrolysed in the oral cavity is_____ of total intake.Select the option which fills the blank in above statement correctly.
(a) 10 percent
(b) 20 percent
(c) 50 percent
(d) 30 percent

Options

A. 10 percent
B. 20 percent
C. 50 percent
D. 30 percent

Answer

To solve the question regarding the amount of starch that is hydrolyzed in the oral cavity, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks for the percentage of starch that is hydrolyzed (broken down) in the oral cavity from the total starch intake.

2. **Identify the Role of Salivary Glands**: In the oral cavity, salivary glands secrete saliva, which contains enzymes that aid in digestion.

3. **Focus on Salivary Amylase**: The key enzyme in saliva is salivary amylase. This enzyme is responsible for initiating the digestion of starch by breaking it down into simpler sugars, primarily maltose.

4. **Determine the Extent of Hydrolysis**: Research and biological knowledge indicate that approximately 30% of the starch intake is hydrolyzed in the oral cavity before the food moves to the stomach.

5. **Select the Correct Option**: Based on the information gathered, the correct answer to fill in the blank is 30%. Therefore, the complete statement reads: "The amount of starch that is normally hydrolyzed in the oral cavity is 30% of total intake."

### Final Answer:
(d) 30 percent

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