Phenolic Acids: Structure and Antioxidant Activity

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What is a characteristic of polyphenols?

They are a type of vitamin

They are only found in dark chocolate

They are commonly found in animal foods

They are known for their antioxidant properties (correct)

What is the common feature of phenolic compounds?

The presence of vitamin K structure

The presence of multiple vitamin units

The presence of large multiples of phenol structural units (correct)

The presence of antioxidant properties

What is the property of polyphenols that makes them beneficial?

Their ability to provide nutritional supplements

Their ability to function as vitamins

Their ability to function as hormones

Their antioxidant properties (correct)

In which type of foods are polyphenols commonly found?

Plant foods Signup and view all the answers

What is the relationship between phenolic acids and lactic acid bacteria?

Lactic acid bacteria metabolize phenolic acids Signup and view all the answers

What is a common feature of coumarin and phenolic compounds?

They have similar structure-activity relationships Signup and view all the answers

What is the primary function of anthocyanins?

To fortify against DNA injury and scavenge free radicals Signup and view all the answers

What does the acylation of sugar residues affect?

The stability, color, and bioactivity of anthocyanins Signup and view all the answers

What is the role of hydroxyl groups in phenolic acids?

To determine the antioxidant activity, acidity, and enzyme interaction of phenolic acids Signup and view all the answers

What is the structural component of phenolic acids that confers antioxidant activity and stability?

Phenolic ring Signup and view all the answers

What is the pathway through which anthocyanins are synthesized in plants?

The phenylpropanoid pathway Signup and view all the answers

What type of rings are linked by a heterocyclic ring in cyanidin?

Two aromatic rings Signup and view all the answers

What is the impact of hydroxyl groups on the flavonol skeleton?

They increase antioxidant activity Signup and view all the answers

What is the significance of the 2,3-double bond in the B-ring of flavonoids?

It is crucial for the characteristic properties of flavonoids Signup and view all the answers

What is the effect of the ketone group at the C4 position of the flavone backbone?

It affects the reactivity, polarity, and potential for metabolic transformation Signup and view all the answers

What is the role of flavonoids in cellular processes?

They influence cellular processes such as proliferation, migration, and survival Signup and view all the answers

What is the significance of the double bond between C2-C3 in the C-ring?

It allows for conjugation, facilitating free radical scavenging Signup and view all the answers

What type of groups can substitute the A-ring of flavonoids?

Methoxy or hydroxyl groups Signup and view all the answers

Phenolic Acids: Structure and Antioxidant Activity

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