Learning Path
Question & Answer1
Understand Question2
Review Options3
Learn Explanation4
Explore TopicChoose the Best Answer
A
Higher total phenolic content generally indicates lower antioxidant activity.
B
Total phenolic content is unrelated to antioxidant activity.
C
Higher total phenolic content typically correlates with higher antioxidant activity.
D
Antioxidant activity is only dependent on vitamin C levels.
Understanding the Answer
Let's break down why this is correct
Answer
The Folin‑Phenol reagent measures the reducing power of phenolic molecules, giving a total phenolic content (TPC) value. Because phenols are good radical scavengers, foods with high TPC usually show strong antioxidant activity in tests such as DPPH or FRAP. However, the correlation is not perfect because other antioxidants like vitamins C and E also contribute, so a food can have high antioxidant activity even with lower TPC. For example, grape juice shows a high TPC by Folin‑Ciocalteu and also a low IC₅₀ in a DPPH assay, illustrating the positive relationship. Thus, TPC measured by the Folin reagent is a useful, though not exclusive, predictor of antioxidant capacity in foods.
Detailed Explanation
When a food has more phenolic compounds, it can donate electrons to neutralize harmful free radicals. Other options are incorrect because The idea that more phenolics mean less antioxidant activity is wrong; Saying phenolics are unrelated to antioxidant activity ignores how they donate electrons.
Key Concepts
total phenolic content
antioxidant activity
Topic
Folin Phenol Reagent
Difficulty
medium level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
1
Question 1In the analysis of wine, how can the Folin Phenol Reagent be utilized in a spectrophotometric method to determine the total phenolic content?
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2
Question 2In the context of wine analysis, how does the Folin Phenol reagent contribute to assessing the quality of food products in terms of antioxidant activity?
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3
Question 3Order the steps involved in utilizing the Folin phenol reagent for protein quantification, starting from the sample preparation to the final measurement.
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