JEE Main 202126 AugustEvening Shift
- Exam
- JEE Main
- Year
- 2021
- Date
- 26 August
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Biomolecules
JEE Main 2021 · 26 August · Evening Shift · Chemistry · Biomolecules
Given below are two statements : one is labelled as Assertion (A)...
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar.
Reason (R): Sucrose involves glycosidic linkage between of -glucose and of -fructose.
Choose the most appropriate answer from the options given below :
Assertion (A) : Sucrose is a disaccharide and a non-reducing sugar.
Reason (R): Sucrose involves glycosidic linkage between of -glucose and of -fructose.
Choose the most appropriate answer from the options given below :
Options
- ABoth (A) and (R) are true and (R) is the true explanation of (A).
- B(A) is true but (R) is false.
- C(A) is false but (R) is true.
- DBoth (A) and (R) are true but (R) is not the true explanation of (A).
Correct answer
B. (A) is true but (R) is false.
Step-by-step solution
In sucrose two monosaccharides are joined together by an oxide linkage formed by loss of water molecule. Such linkage through oxygen atom is called glycosidic linkage. In sucrose linkage in between of -glucose and of -fructose. Since the reducing group of glucose & fructose are involved in glycosidic bond formation, sucrose is non reducing sugar.