Textbook Question
Explain how the catabolism of fructose differs from that of glucose.
Ch.12 Food as Fuel An Overview of Metabolism
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696
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Table of contents
- Ch.4 Introduction to Organic Compounds75
- Ch.5 Chemical Reactions19
- Ch.6 Carbohydrates Life's Sweet Molecules62
- Ch.7 States of Matter and Their Attractive Forces8
- Ch.8 Solution Chemistry Sugar and Water Do Mix4
- Ch.10 Proteins Workers of the Cell89
- Ch.11 Nucleic Acids Big Molecules with a Big Role69
- Ch.12 Food as Fuel An Overview of Metabolism65
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696Not the one you use?Change textbook
Chapter 8, Problem 28
Name the coenzyme produced during the conversion of pyruvate to acetyl CoA.
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Understand the context: The conversion of pyruvate to acetyl CoA is a key step in cellular respiration, specifically in the link reaction between glycolysis and the citric acid cycle.
Identify the chemical process: During this reaction, pyruvate undergoes oxidative decarboxylation, which involves the removal of a carbon atom as carbon dioxide (CO2).
Recognize the role of coenzymes: Coenzymes are molecules that assist enzymes in catalyzing reactions. In this process, a coenzyme is reduced as electrons are transferred.
Determine the specific coenzyme involved: The coenzyme that is reduced during this reaction is NAD+, which becomes NADH as it accepts electrons and a hydrogen ion.
Conclude the naming: The coenzyme produced during the conversion of pyruvate to acetyl CoA is NADH, which plays a crucial role in carrying electrons to the electron transport chain.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Pyruvate Decarboxylation
Pyruvate decarboxylation is the process by which pyruvate, derived from glycolysis, is converted into acetyl CoA. This reaction occurs in the mitochondria and involves the removal of a carbon atom from pyruvate, releasing it as carbon dioxide. This step is crucial for linking glycolysis to the citric acid cycle.
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1:38
Pyruvate Oxidation Concept 2
Coenzyme A (CoA)
Coenzyme A (CoA) is a vital coenzyme that plays a key role in the metabolism of fatty acids and the citric acid cycle. It acts as a carrier of acyl groups, facilitating the transfer of acetyl groups to various metabolic pathways. In the conversion of pyruvate to acetyl CoA, CoA is essential for the formation of acetyl CoA from the decarboxylated pyruvate.
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1:10Coenzyme A Example 4
NAD+ and NADH
NAD+ (nicotinamide adenine dinucleotide) is a coenzyme that functions as an electron carrier in various metabolic reactions, including the conversion of pyruvate to acetyl CoA. During this process, NAD+ is reduced to NADH, capturing high-energy electrons. This conversion is crucial for energy production and is a key step in cellular respiration.
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1:43Intro to Electron Transport Chain Example 1
Related Practice
Textbook Question
Indicate whether the statements below apply to the glucose-regulating hormone insulin or to glucagon:
(a) signals cells to take up glucose
Textbook Question
Name the reactions in the citric acid cycle that involve oxidative decarboxylation.
Textbook Question
In terms of high-energy molecules, what is the net output for one molecule of glucose undergoing glycolysis?
Textbook Question
Indicate whether the statements below apply to the glucose-regulating hormone insulin or to glucagon:
(c) not produced in people with type 1 diabetes
Textbook Question
The formation of lactate permits glycolysis to continue under anaerobic conditions. Explain.