Glycosides and Glycones

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Questions and Answers

Which glycoside subgroup contains thiocyanate group?

  • Flavone glycosides
  • Cyanogenic glycosides
  • Aldehyde glycosides
  • Thiocyanate glycosides (correct)

What is the property of Steroidal glycosides in relation to heart failure?

  • Laxative properties
  • For heart failure (correct)
  • Expectorant properties
  • Antioxidant properties

Which plant is a source of Flavone glycosides?

  • Orange (correct)
  • Digitalis Purpurea
  • Foxglove
  • Rhubarb

What is the result of the test for Anthraquinone glycosides?

<p>PINK / RED in ammonical layer (C)</p> Signup and view all the answers

Which test is used to detect Saponin glycosides?

<p>Drop blood on slide + mixed with few drops of extract (A)</p> Signup and view all the answers

What is the characteristic of Aldehyde glycosides?

<p>Bitter taste (D)</p> Signup and view all the answers

What is a glycoside composed of?

<p>A sugar molecule bonded to a non-sugar group via a glycosidic bond (D)</p> Signup and view all the answers

What is a characteristic of a glycone?

<p>Soluble in water due to the presence of -OH (A)</p> Signup and view all the answers

What type of glycoside is formed when a sugar molecule bonds with a phenol or –OH group of aglycone?

<p>O-glycoside (C)</p> Signup and view all the answers

What is a characteristic of a cardiac glycoside?

<p>Has a steroid-like structure (D)</p> Signup and view all the answers

What type of glycoside is formed when a sugar molecule bonds with the –NH group of aglycone?

<p>N-glycoside (A)</p> Signup and view all the answers

What is a characteristic of saponin glycosides?

<p>Foams when shaken in water (A)</p> Signup and view all the answers

What is the result of mixing a flavonoid glycoside extract with zinc dust and hydrochloric acid?

<p>A flavonoid glycoside is formed (B)</p> Signup and view all the answers

What is the purpose of adding sodium picrate solution and sodium carbonate solution to the neck of a flask using a cork?

<p>To trap sulphuric acid (B)</p> Signup and view all the answers

What is the result of adding a few drops of ferric chloride solution to a thiocyanate glycoside extract?

<p>A yellow color is formed (A)</p> Signup and view all the answers

What is the purpose of adding acetic anhydride and concentrated sulfuric acid to a steroidal glycoside extract?

<p>To detect the presence of steroidal glycosides (A)</p> Signup and view all the answers

What is the result of adding chloroform and concentrated sulfuric acid to a steroidal glycoside extract?

<p>A yellow ring is formed at the junction of two liquids (C)</p> Signup and view all the answers

What is the result of adding Tollens' reagent to an aldehyde glycoside extract?

<p>A silver mirror is formed (D)</p> Signup and view all the answers

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