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Which enzymes are likely to act on the b...

Which enzymes are likely to act on the baked potatoes eaten by a man, starting from the mouth and as it moves down the alimentary canal?

A

Salivary maltase - carboxy peptidase - trypsinogen

B

Pancreatic amylase -salivary amylase -lipases

C

Disaccharidase like maltase- lipases- nucleases

D

Salivary amylase - pancreatic amylase - disaccharidases

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question regarding which enzymes act on baked potatoes as they move through the alimentary canal, we can break down the process step by step: ### Step-by-Step Solution: 1. **Mouth**: - **Enzyme**: Salivary Amylase - **Action**: When baked potatoes are eaten, the digestion of carbohydrates begins in the mouth. The enzyme salivary amylase, secreted by the salivary glands, starts breaking down the starch (a polysaccharide) in the potatoes into smaller carbohydrate units, primarily disaccharides. This process accounts for about 30% of carbohydrate digestion. 2. **Stomach**: - **Enzyme**: None specific for carbohydrates - **Action**: In the stomach, the acidic environment halts the activity of salivary amylase. No specific carbohydrate-digesting enzymes act here, but the food is mixed and further broken down mechanically. 3. **Small Intestine**: - **Enzyme**: Pancreatic Amylase - **Action**: Once the partially digested food enters the small intestine, pancreatic juice containing pancreatic amylase is secreted. This enzyme continues the breakdown of starches into disaccharides. 4. **Small Intestine (continued)**: - **Enzymes**: Brush Border Enzymes (e.g., Maltase, Sucrase, Lactase) - **Action**: The disaccharides formed by pancreatic amylase are further broken down into monosaccharides by enzymes located on the brush border of the small intestine. For example, maltase converts maltose into glucose. 5. **Absorption**: - **Action**: The monosaccharides (like glucose) are then absorbed through the intestinal walls into the bloodstream. ### Final Sequence of Enzymes: 1. Salivary Amylase (in the mouth) 2. Pancreatic Amylase (in the small intestine) 3. Brush Border Enzymes (in the small intestine)
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