Polyphenols

Question 1

How many classes

Answer 1

10

Question 2

Main classes of flavonoids

Answer 2

Flavonols, flavanols, flavones, flavanones, isoflavones and anthocyanidins

Question 3

5 suggestive mechanisms for phytosterols

Answer 3

1. Competitive inhibition
2. Reduced expression of Niemann Pick C1 Like Protein on mucosal brush border - reducing absorption
3. Reduced esterification - reducing chylomicron
4. Co-crystallisation
5. Increased expression - increasing efflux

Question 4

Produced from

Answer 4

Phenylalanine via phenylpropanoid pathway

Question 5

Flavonoid structure

Answer 5

2 aromatic rings joined by an oxygenated C ring

Question 6

Phytosterols

Answer 6

4 ring sterols with a hydrocarbon side chain, differentiating by the C4 on ring A

Question 7

Phytosterols variation

Answer 7

4 desmethyl sterol
4 alpha monomethyl
4, 4 dimethyl

(without double bond on C5 - phytostanol)