Podcast
Questions and Answers
What is the general structure of flavonoids?
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?
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?
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?
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?
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?
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?
How do many plants store chemicals in the form of inactive glycosides?
What is the preferred term for 'C-glycoside' according to IUPAC?
What is the preferred term for 'C-glycoside' according to IUPAC?
What does the sugar group in a glycoside molecule qualify as?
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 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 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 is the preferred term for 'C-glycoside' according to IUPAC?
What do many plants store chemicals in the form of?
What do many plants store chemicals in the form of?
What is the non-sugar group called in a glycoside molecule?
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.
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.
