Question:
Which one of the following enzymes sequentially releases maltose from starch?
Which one of the following enzymes sequentially releases maltose from starch?
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\( \beta \)-Amylase is essential for breaking down starch into maltose by sequentially removing glucose units from the non-reducing end of the polysaccharide.
Updated On: Jan 6, 2026
- \( \alpha \)-Amylase
- \( \beta \)-Amylase
- Glucoamylase
- Pullulanase
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The Correct Option is B
Solution and Explanation
The breakdown of starch involves various enzymes that act on the starch polysaccharide to release sugars. The enzymes that break down starch include:
- \( \alpha \)-Amylase: This enzyme breaks starch into maltose and dextrins by cleaving the internal bonds of the starch molecule.
- \( \beta \)-Amylase: This enzyme sequentially releases maltose units from the non-reducing ends of the starch molecule. This process involves the removal of two glucose units at a time, producing maltose.
- Glucoamylase: This enzyme hydrolyzes starch and maltose to produce glucose units, but it is not involved in releasing maltose from starch.
- Pullulanase: This enzyme acts specifically on pullulan (a polysaccharide) and breaks down α-1,6-glucosidic linkages but does not play a role in the breakdown of starch into maltose.
Thus, the enzyme that sequentially releases maltose from starch is \( \beta \)-Amylase. Final Answer: \[ \boxed{\beta \text{-Amylase}}. \]
- \( \beta \)-Amylase: This enzyme sequentially releases maltose units from the non-reducing ends of the starch molecule. This process involves the removal of two glucose units at a time, producing maltose.
- Glucoamylase: This enzyme hydrolyzes starch and maltose to produce glucose units, but it is not involved in releasing maltose from starch.
- Pullulanase: This enzyme acts specifically on pullulan (a polysaccharide) and breaks down α-1,6-glucosidic linkages but does not play a role in the breakdown of starch into maltose.
Thus, the enzyme that sequentially releases maltose from starch is \( \beta \)-Amylase. Final Answer: \[ \boxed{\beta \text{-Amylase}}. \]
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