Question

Hydrolysis of which disaccharide in presence of enzyme maltase gives glucose only?

• A. Sucrose
• B. Cellulose
• C. Lactose
• D. Maltose

Hint:

Remember the hydrolysis products: \[ \text{Maltose} \rightarrow \text{Glucose + Glucose} \] \[ \text{Sucrose} \rightarrow \text{Glucose + Fructose} \] \[ \text{Lactose} \rightarrow \text{Glucose + Galactose} \] Maltose is the only common disaccharide that yields only glucose molecules.

Answer 1

The Correct Option is D

Step 1: Recall what maltase does.
Maltase is a specific enzyme that hydrolyses only maltose. It breaks the \(\alpha\)-1,4-glycosidic bond in maltose.

Step 2: Identify the product.
Maltose = glucose + glucose (both units are glucose). So hydrolysis of maltose by maltase gives only glucose. Sucrose gives glucose + fructose; lactose gives glucose + galactose; cellulose is a polysaccharide, not a disaccharide. \[ oxed{ ext{Maltose}} \]