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Flavonoids and Their Chemical Structure

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What is the general structure of flavonoids?

15-carbon skeleton with two phenyl rings and a heterocyclic ring (correct)

17-carbon skeleton with three phenyl rings and a heterocyclic ring

13-carbon skeleton with two phenyl rings and a heterocyclic ring

11-carbon skeleton with one phenyl ring and a heterocyclic ring

According to IUPAC nomenclature, what structure do neoflavonoids derive from?

5-phenylcoumarin (5-phenyl-1,2-benzopyrone)

4-phenylcoumarin (4-phenyl-1,2-benzopyrone) (correct)

3-phenylchromen-4-one (3-phenyl-1,4-benzopyrone)

2-phenylchromen-3-one (2-phenyl-1,3-benzopyrone)

Which class of compounds are anthoxanthins?

Aldehyde-containing compounds

Carboxylic acid-containing compounds

Ester-containing compounds

Ketone-containing compounds (correct)

What are the three cycles or heterocycles in the flavonoid backbone generally called?

Ring A, B, and C Signup and view all the answers

Who discovered that Vitamin C alone was not as effective at preventing scurvy as the crude yellow extract from oranges, lemons or paprika?

Albert Szent-Györgyi Signup and view all the answers

What type of bond is formed between a sugar group and another group in a glycoside?

C-glycosidic bond Signup and view all the answers

How do many plants store chemicals in the form of inactive glycosides?

By using enzyme hydrolysis Signup and view all the answers

What is the preferred term for 'C-glycoside' according to IUPAC?

C-glycosidic compound Signup and view all the answers

What does the sugar group in a glycoside molecule qualify as?

Glycone Signup and view all the answers

What role do poisons often play in animals and humans in relation to glycosides?

Bound to sugar molecules for elimination from the body Signup and view all the answers

What type of bond is formed between a sugar group and another group in a glycoside?

C-glycoside Signup and view all the answers

What is the preferred term for 'C-glycoside' according to IUPAC?

C-glycosyl compound Signup and view all the answers

What do many plants store chemicals in the form of?

Inactive glycosides Signup and view all the answers

What is the non-sugar group called in a glycoside molecule?

Aglycone Signup and view all the answers

In formal terms, a glycoside is any molecule in which a sugar group is bonded through its anomeric carbon to another group via a __________ bond.

Glycosidic Signup and view all the answers

Flavonoids and Their Chemical Structure

Choose a study mode

Podcast

Questions and Answers

What is the general structure of flavonoids?

According to IUPAC nomenclature, what structure do neoflavonoids derive from?

Which class of compounds are anthoxanthins?

What are the three cycles or heterocycles in the flavonoid backbone generally called?

Who discovered that Vitamin C alone was not as effective at preventing scurvy as the crude yellow extract from oranges, lemons or paprika?

What type of bond is formed between a sugar group and another group in a glycoside?

How do many plants store chemicals in the form of inactive glycosides?

What is the preferred term for 'C-glycoside' according to IUPAC?

What does the sugar group in a glycoside molecule qualify as?

What role do poisons often play in animals and humans in relation to glycosides?

What type of bond is formed between a sugar group and another group in a glycoside?

What is the preferred term for 'C-glycoside' according to IUPAC?

What do many plants store chemicals in the form of?

What is the non-sugar group called in a glycoside molecule?

In formal terms, a glycoside is any molecule in which a sugar group is bonded through its anomeric carbon to another group via a __________ bond.

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