Identify correct conversion during acidic hydrolysis from the following: (A) starch gives galactose. (B) cane sugar…
Biomolecules · Class 12 · JEE Main Previous Year Question
Identify correct conversion during acidic hydrolysis from the following:
(A) starch gives galactose. (B) cane sugar gives equal amount of glucose and fructose. (C) milk sugar gives glucose and galactose. (D) amylopectin gives glucose and fructose. (E) amylose gives only glucose.
Choose the correct answer from the options given below:
- a✓
(B), (C) and (E) only
- b
(A), (B) and (C) only
- c
(C), (D) and (E) only
- d
(B), (C) and (D) only
(B), (C) and (E) only
Step 1: Analyzing Polysaccharides — Starch, amylopectin, and amylose are all composed entirely of glucose units. Their hydrolysis yields only glucose, not galactose or fructose.
Step 2: Analyzing Disaccharides — Cane sugar (sucrose) hydrolyzes into glucose and fructose. Milk sugar (lactose) hydrolyzes into glucose and galactose.
Step 3: Selection — Statements (B), (C), and (E) correctly describe the hydrolysis products of sucrose, lactose, and amylose respectively.
Key Point: Hydrolysis splits glycosidic bonds by adding water molecules across them.
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