Which of the following statements about starch digestion is false?

Options

A. It begins in mouth
B. It occurs in oesophagus
C. It requires the action of pancreatic amylase
D. Its digestion is completed into small intestine

Answer

To determine which statement about starch digestion is false, we will analyze each option provided in the question step by step.

### Step-by-Step Solution:

1. **Identify the Process of Starch Digestion**:
- Starch is a polysaccharide that begins its digestion in the mouth.

2. **Evaluate Option 1**:
- **Statement**: "Starch digestion begins in the mouth."
- **Analysis**: This statement is true. Salivary amylase, an enzyme present in saliva, starts breaking down starch into simpler sugars.

3. **Evaluate Option 2**:
- **Statement**: "It occurs in the esophagus."
- **Analysis**: This statement is false. The esophagus is primarily a conduit for food to travel from the mouth to the stomach, and no significant digestion occurs here.

4. **Evaluate Option 3**:
- **Statement**: "It requires the action of pancreatic amylase."
- **Analysis**: This statement is true. After the stomach, pancreatic amylase is secreted into the small intestine to further digest starch into disaccharides.

5. **Evaluate Option 4**:
- **Statement**: "Its digestion is completed in the small intestine."
- **Analysis**: This statement is true. The small intestine is where starch digestion is completed, converting disaccharides into monosaccharides.

6. **Conclusion**:
- Based on the evaluations, the only false statement is Option 2, which claims that starch digestion occurs in the esophagus.

### Final Answer:
The false statement about starch digestion is **Option 2: "It occurs in the esophagus."**

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