Prior to absorption, grape sugar is hydrolyzed by the enzyme.

Options

A. lactase
B. maltase
C. sucrose
D. none of these

Answer

**Step-by-Step Solution:**

1. **Identify Grape Sugar**: Grape sugar is commonly known as glucose. It is a simple sugar and a monosaccharide.

2. **Understand Monosaccharides**: Monosaccharides, such as glucose, do not require hydrolysis for absorption. They are already in their simplest form.

3. **Absorption Process**: Since glucose can be directly absorbed into the bloodstream without any further breakdown, there is no need for hydrolysis.

4. **Enzyme Requirement**: Hydrolysis typically involves enzymes that break down larger carbohydrates into simpler sugars. However, since glucose is already a monosaccharide, no enzyme is needed for its hydrolysis.

5. **Conclusion**: Therefore, the answer to the question is that prior to absorption, grape sugar (glucose) is not hydrolyzed by any enzyme, as it does not require hydrolysis.

**Final Answer**: No enzyme is used for the hydrolysis of glucose prior to absorption.

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