The two forms of $D-$ glucopyranose obtained from the solution of $D-$ glucose are called
A
Isomer
B
Anomer
C
Epimer
D
Enantiomer
IIT 2005, Difficult
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B
Anomer
b (b) Two form of $D-$ Glucopyranose are $\alpha\,-D\,(+)-$ Glucopyranose and $\alpha\,-D\,(+)-$ Glucopyranose. These are anomers (a pair of stereoisomers which differ in configuration only around ${C_1}$ are called anomers).
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Assertion : Alpha $\left( \alpha \right) - $ amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity.
Reason : $H^+$ ion given by carboxylic group $(-COOH)$ is captured by amino group $(-NH_2)$ having lone pair of electrons.