Which of the following statements about the process of digestion is correct ?
I. Carbohydrates in the chyme are hydrolyzed by pancreatic amylase into monosaccharides directly .
II. Nucleases in the intestinal juice act on nucleic acids to from nucleotides and nucleosides .

Options

A. Both I and II are correct
B. Both I and II are wrong
C. I is correct and II is wrong
D. II is correct and I is wrong

Answer

To determine which of the statements about the process of digestion is correct, let's analyze each statement step by step.

### Step 1: Analyze Statement I
**Statement I:** Carbohydrates in the chyme are hydrolyzed by pancreatic amylase into monosaccharides directly.

- **Understanding Chyme:** Chyme is the semi-fluid mass of partly digested food that is expelled by the stomach into the small intestine.
- **Role of Pancreatic Amylase:** Pancreatic amylase is an enzyme secreted by the pancreas into the small intestine. Its primary function is to break down carbohydrates.
- **Process of Carbohydrate Digestion:**
- Carbohydrates, particularly polysaccharides (like starch), are broken down by pancreatic amylase into disaccharides (like maltose).
- Disaccharides are then further hydrolyzed into monosaccharides (like glucose) by other enzymes (such as maltase).

**Conclusion for Statement I:** The statement claims that carbohydrates are hydrolyzed directly into monosaccharides, which is incorrect. They are first converted into disaccharides before being broken down into monosaccharides.

### Step 2: Analyze Statement II
**Statement II:** Nucleases in the intestinal juice act on nucleic acids to form nucleotides and nucleosides.

- **Understanding Nucleases:** Nucleases are enzymes that break down nucleic acids (DNA and RNA) into smaller units.
- **Role of Nucleases:** These enzymes hydrolyze nucleic acids into nucleotides and nucleosides.
- **Source of Nucleases:** Nucleases are primarily found in pancreatic juice, not intestinal juice. They are secreted by the pancreas into the small intestine to aid in digestion.

**Conclusion for Statement II:** While the action of nucleases on nucleic acids to form nucleotides and nucleosides is correct, the statement incorrectly attributes them to intestinal juice instead of pancreatic juice.

### Final Conclusion
Both statements are incorrect:
- Statement I is incorrect because carbohydrates are not directly hydrolyzed into monosaccharides; they first become disaccharides.
- Statement II is incorrect because nucleases are part of pancreatic juice, not intestinal juice.

### Answer: Both statements are incorrect.

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