Which one of the following is a reducing sugar?
Biomolecules · Class 12 · JEE Main Previous Year Question
Which one of the following is a reducing sugar?
- a✓
Option a
- b
Option b
- c
Option c
- d
Option d
Option a
Step 1: Identifying Reducing Sugars — A reducing sugar must have a free hemiacetal or hemiketal group (an group on the anomeric carbon).
Step 2: Checking the Options — We analyze each structure in the image to locate a free anomeric position that can open into an aldehyde or ketone.
Step 3: Conclusion — In structure (a), the free hemiacetal group allows it to reduce or reagent. Thus, (a) is a reducing sugar.
Key Point: Non-reducing sugars have their anomeric carbons locked in glycosidic linkages.
Practice this question with progress tracking
Want timed practice with adaptive difficulty? Solve this question (and hundreds more from Biomolecules) inside The Crucible, our adaptive practice platform.
More JEE Main Biomolecules PYQs
Which of the following is the correct structure of L-fructose?
Identify the number of structure/s from the following which can be correlated to D-glyceraldehyde.
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…
Fat soluble vitamins are: A. Vitamin B1 B. Vitamin C C. Vitamin E D. Vitamin B12 E. Vitamin K Choose the correct answer from the options given below:
Which of the following acids is a vitamin?