Question

The correct sequence for digestion and of absorption of carbohydrates in human body is as follows: A. Sucrase, maltase lactase convert respective disaccharide to monosaccharides B. Salivary amylase converts digestible starches to disaccharide C. Pancreatic amylase converts digestible starches to dissacharides D. Monosaccharides are absorbed into blood capillaries of villi E. HCl denatures and stops action of salivary amylase

• A. B, E, C, A, D
• B. E, D, C, B, A
• C. A, B, C, D, E
• D. C, A, E, D, B

Hint:

Remember the order of digestive processes: mouth (salivary amylase), stomach (HCl denaturation), small intestine (pancreatic and intestinal enzymes), and finally absorption in the villi.

Answer 1

The Correct Option is A

Step 1: Concept
The process of digestion involves breaking down complex carbohydrates into simpler forms that can be absorbed by the body. The absorption occurs when these simple sugars enter the bloodstream through the intestinal wall.

Step 2: Meaning
The correct sequence should start with the initial breakdown of starches, continue with further disaccharide conversion, and end with the absorption of monosaccharides.

Step 3: Analysis
B states that salivary amylase converts digestible starches to disaccharides. This is accurate as salivary amylase starts breaking down starch in the mouth. E mentions HCl denaturing and stopping the action of salivary amylase, which happens in the stomach where acidic conditions are present. C indicates that pancreatic amylase converts digestible starches to disaccharides. This occurs in the small intestine after the stomach. A states that sucrase, maltase, and lactase convert respective disaccharides to monosaccharides. These enzymes act in the small intestine on sucrose, maltose, and lactose respectively. D mentions that monosaccharides are absorbed into blood capillaries of villi, which is correct as this absorption happens in the intestinal lining.

Step 4: Conclusion
The sequence must start with salivary amylase breaking down starches, followed by the stomach stopping the action due to acidity, then pancreatic amylase converting starches further, and finally sucrase, maltase, and lactase converting disaccharides into monosaccharides for absorption. Final Answer: (A)