Question

Which of following enzymes is useful in conversion of glucose to fructose?

• A. Invertase
• B. Glucose isomerase
• C. Amylase
• D. Proteases

Hint:

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.

Answer 1

The Correct Option is B

Step 1: Understand the question.
We must find the enzyme that turns glucose into fructose. Both are six carbon sugars, but glucose has an aldehyde group and fructose has a ketone group.
Step 2: Recall that enzymes are specific.
Each enzyme does one special job. Changing one sugar into another sugar shape is called isomerization.
Step 3: Look at the name that fits.
An enzyme that does isomerization of glucose has the word "isomerase" in it. That is glucose isomerase.
Step 4: Rule out invertase.
Invertase splits sucrose into glucose and fructose. It does not turn glucose into fructose directly.
Step 5: Rule out amylase and proteases.
Amylase breaks down starch. Proteases break down proteins. Neither touches the glucose to fructose change.
Step 6: Choose the answer.
The right enzyme is glucose isomerase, which is option 2. \[ \boxed{\text{Glucose isomerase}} \]