Match List I with List II, Biomolecules, JEE Main Previous Year Questions

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Solution

Q.
Match List I with List II

List I List II

A. $α$ -Glucose and $α$ -Galactose I. Functional isomers

B. $α$ -Glucose and $β$ -Glucose II. Homologous

C. $α$ -Glucose and $α$ -Fructose III. Anomers

D. $α$ -Glucose and $α$ -Ribose IV. Epimers

Choose the correct answer from the options given below: [2024]

1
A-III, B-IV, C-II, D-I

2
A-III, B-IV, C-I, D-II

3
A-IV, B-III, C-II, D-I

4
A-IV, B-III, C-I, D-II

Ans.
(4)

A. Epimers are diastereomers that differ in configuration at only one chiral centre. $α$ -Glucose and $α$ -Galactose are C-4 epimers.

B. Anomers are epimers which differ in configuration at acetal or hemiacetal carbon. $α$ -D-glucose and $β$ -D-glucose are anomers.

C. Glucose is an aldohexose and fructose is a ketohexose. These are thus functional isomers.

D. Formula of glucose ( $C_{6} H_{12} O_{6}$ ) differs by — ${CH}_{2}$ unit with the formula of ribose ( $C_{5} H_{10} O_{5}$ ). So, Homologns

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