Biomolecules and Chemistry in Everyday Life - Result Question 27
28. The correct statement(s) about the following sugars $X$ and $Y$ is/are:
(2009)
(a) $X$ is a reducing sugar and $Y$ is a non-reducing sugar
(b) $X$ is a non-reducing sugar and $Y$ is a reducing sugar
(c) The glucosidic linkages in $X$ and $Y$ are $\alpha$ and $\beta$, respectively
(d) The glucosidic linkages in $X$ and $Y$ are $\beta$ and $\alpha$, respectively
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Answer:
Correct Answer: 28. (b, c)
Solution:
- $X$ is acetal, has no free hemiacetal, hence a non-reducing sugar while $Y$ has a free hemiacetal group, it is reducing sugar. Also, glucosidic linkage of $X$ is ’ $\alpha$ ’ while that of $Y$ is $\beta$-linkage.
BETA
