Explanation The citric acid cycle is a cyclic process which involves the oxidation of acteyl-CoA. The cycle involves eight steps: The first step involves the addition of acteyl-CoA on oxaloacetate to form citrate. The second step involves the aconitase enzyme that converts citrate into isocitrate. The third step involves the formation of α-ketoglutarate with the removal of carbon dioxide and 1 molecule of NADH. The fourth step involves the formation of Succinyl-CoA from α-ketoglutarate . Carbon dioxide and NADH are formed as by-product. The fifth step involves the formation of a molecule of GTP, an energy carrier and the formation of succinate takes place. The sixth step involves the formation of fumarate that takes place from succinate in the presence of succinate dehydrogenase. The next step is the formation of malate in the presence of fumarase. The eighth step involves the formation of oxaloacetate and the formation of 1 NADH molecule. The steps of citric acid cycle that do not involve the redox reactions are given as follows. The first step involves the addition of acteyl-CoA with oxaloacetate to form citrate. The reaction for the same is,

Introduction To General, Organic, And Biochemistry

12th Edition

ISBN: 9781337571357

Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres

Publisher: Cengage Learning

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Question

Chapter 26, Problem 28P

Interpretation Introduction

Interpretation:

The number of steps of citric acid cycle which are not the redox reactions are to be identified.

Concept introduction:

Citric acid cycle is also known as Krebs cycle. It is a series of chemical processes in the aerobic organisms that involves the oxidation of acetyl-CoA obtained as a product from glycolysis. The cycle involves eight steps.

Expert Solution & Answer

Chapter 26 Solutions

Introduction To General, Organic, And Biochemistry

Ch. 26.1 - Prob. 26.1QC Ch. 26.2 - Prob. 26.2QC Ch. 26.3 - Prob. 26.3QC Ch. 26.4 - Prob. 26.4QC Ch. 26.5 - Prob. 26.5QC Ch. 26.6 - Prob. 26.6QC Ch. 26.7 - Prob. 26.7QC Ch. 26.8 - Prob. 26.8QC Ch. 26 - Prob. 1P Ch. 26 - Prob. 2P

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