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Questions and Answers List

CLASSIFICATION PART

Question	Answer
This glycosidal formations are common in plants They are hydrolyzed by treatment with acid or alkali into glycone and aglycone portion	Oxygen (O-glycosides)
The occurrence of this glycoside is restricted to isothiacyanate glycoside like sinigrin in black mustard formed by condensation of sulphohydryl group aglycone to OH group of glycone.	Sulphur (S-glycoside)
The most common representation is the nucleoside where the amino group reacts with OH group of ribose or deoxyribose resulting into this	Nitrogen (N-glycoside)
Example of this type of glycoside are some of the anthraquinone glycoside like cascaroside in cascara, aloin in aloes.	Carbon (C-glycoside)
For purposes of biochemistry and pharmacology, this is the most useful classification.	Chemical nature of the aglycone.
O-glycosides are common in examples of what plant?	1 Rhubarb 2 Senna
C-glycosides examples	1 Cascarosides in cascara 2 Aloin in aloes
1 S-glycoside examples 2 N-glycoside examples	1 Sinigrin in black mustard 2 Nucleosides