Question:
Which of following enzymes is useful in conversion of glucose to fructose?
Which of following enzymes is useful in conversion of glucose to fructose?
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Glucose (aldose) to fructose (ketose) is an isomerization reaction. The suffix "-ase" often indicates an enzyme; "isomerase" specifically refers to enzymes that catalyze structural rearrangements.
Updated On: Jun 4, 2026
- Invertase
- Glucose isomerase
- Amylase
- Proteases
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The Correct Option is B
Solution and Explanation
Step 1: Understanding the Question:
We need the enzyme that converts glucose (an aldohexose) to fructose (a ketohexose).
Step 2: Key Formula or Approach:
Enzymes are specific. Glucose isomerase (also called xylose isomerase) catalyzes the isomerization of D-glucose to D-fructose.
Step 3: Detailed Explanation:
- (A) Invertase: Converts sucrose into glucose and fructose (hydrolysis of glycosidic bond), not glucose to fructose directly.
- (B) Glucose isomerase: Correct – used industrially to produce high-fructose corn syrup from glucose.
- (C) Amylase: Hydrolyzes starch into maltose and dextrins.
- (D) Proteases: Hydrolyze proteins into amino acids.
Step 4: Final Answer:
Glucose isomerase, option (B).
We need the enzyme that converts glucose (an aldohexose) to fructose (a ketohexose).
Step 2: Key Formula or Approach:
Enzymes are specific. Glucose isomerase (also called xylose isomerase) catalyzes the isomerization of D-glucose to D-fructose.
Step 3: Detailed Explanation:
- (A) Invertase: Converts sucrose into glucose and fructose (hydrolysis of glycosidic bond), not glucose to fructose directly.
- (B) Glucose isomerase: Correct – used industrially to produce high-fructose corn syrup from glucose.
- (C) Amylase: Hydrolyzes starch into maltose and dextrins.
- (D) Proteases: Hydrolyze proteins into amino acids.
Step 4: Final Answer:
Glucose isomerase, option (B).
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