Starch is changed into disaccharides in pressence of:

Options

A. Diastase
B. Maltase
C. Lactase
D. Zymase

Answer

**Step-by-Step Solution:**

1. **Understanding Starch:** Starch is a polysaccharide made up of numerous glucose units linked together. It serves as a storage form of energy in plants.

2. **Definition of Disaccharides:** Disaccharides are carbohydrates composed of two monosaccharide units. Common examples include sucrose, lactose, and maltose.

3. **Conversion Process:** The question asks about the conversion of starch into disaccharides. This process involves breaking down the starch molecules.

4. **Role of Enzymes:** The enzyme responsible for breaking down starch into disaccharides is called diastase (or amylase). Diastase catalyzes the hydrolysis of starch, leading to the formation of maltose.

5. **Formation of Maltose:** When starch is hydrolyzed by diastase, it is converted into maltose, which is a disaccharide consisting of two glucose units.

6. **Conclusion:** Therefore, the correct answer to the question is that starch is changed into disaccharides in the presence of diastase.

**Final Answer:** Starch is changed into disaccharides in the presence of diastase.

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