Ascorbic acid:What does it mean to say that ascorbic acid is a strong reducing agent?What is the active form of ascorbic acid in plasma and how is it formed?How can we distinguish the various oxidation states of ascorbic acid?Using chemical symbols or structures, illustrate the reducing activity of ascorbate in forming ascorbyl radical and dehydroascorbic acidWhy do we refer to the ascorbate/ascorbyl-radical/dehydroascorbate system as a reversible redox system?Explain the role of ascorbic acid in：Collagen synthesisIron absorptionRegeneration of a-tocopherol

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Ascorbic acid: What does it mean to say that ascorbic acid is a strong reducing agent? What is the active form of ascorbic acid in plasma and how is it formed? How can we distinguish the various oxidation states of ascorbic acid?

Ascorbic acid: What does it mean to say that ascorbic acid is a strong reducing agent? What is the active form of ascorbic acid in plasma and how is it formed? How can we distinguish the various oxidation states of ascorbic acid?

Biochemistry

6th Edition

ISBN:9781305577206

Author:Reginald H. Garrett, Charles M. Grisham

Publisher:Reginald H. Garrett, Charles M. Grisham

Chapter20: Electron Transport And Oxidative Phosphorylation

Section: Chapter Questions

Problem 16P

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Concept explainers

Metabolic pathways

Metabolism is defined as the group of life-supporting, enzyme-mediated chemical reactions in organisms. A metabolic pathway is a set of these chemical reactions that involve anabolism (synthesis of complex biomolecules) and catabolism (breakdown of biomolecules into small molecules) that occur inside a cell. Metabolites are the reacting substances, products, and intermediate substances of an enzymatic process that are altered by a series of chemical events catalyzed by enzymes.

Question

1. Ascorbic acid:
- What does it mean to say that ascorbic acid is a strong reducing agent?
- What is the active form of ascorbic acid in plasma and how is it formed?
- How can we distinguish the various oxidation states of ascorbic acid?
- Using chemical symbols or structures, illustrate the reducing activity of ascorbate in forming ascorbyl radical and dehydroascorbic acid
- Why do we refer to the ascorbate/ascorbyl-radical/dehydroascorbate system as a reversible redox system?
- Explain the role of ascorbic acid in：
- Collagen synthesis
- Iron absorption
- Regeneration of a-tocopherol

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