VPY-0050
QUESTION
Which among the following is 4-0-β-D- glucopyranosyl-D-glucopyranose?
OPTIONS
(A) Maltose
(B) Lactose
(C) Cellobiose
(D) Isomaltose
ANSWER
(C) Cellobiose
EXPLANATION
Cellobiose is the correct option because cellobiose is composed of two D-glucose units joined by a β(1→4) glycosidic bond, corresponding to 4-O-β-D-glucopyranosyl-D-glucopyranose. Maltose has an α(1→4) glucose-glucose linkage, lactose contains glucose and galactose, and isomaltose has an α(1→6) glucose-glucose linkage.
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