A certain compound gives negative test with ninhydrin and positive test with Benedict's solution. The compound is
A
A protein
B
A monosaccharide
C
A lipid
D
An amino acid
Medium
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B
A monosaccharide
b (b) Protein gives blue-violet colour with ninhydrin ($2$, $2$ - dihydroxyindane - $1$, $3$ -diene)
Carbohydrates gives brown red ppt. with benedict’s solution ($Alk$. $CuS{O_4} + $ Citrate ions)
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Glycogen is a branched chain polymer of $\alpha -D$ -glucose units in which chain is formed by $C_1-C_4$ glycosidic linkage whereas branching occurs by the formation of $C_1-C_6$ glycosidic linkage. Structure of glycogen is similar to