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Which of the following structural descriptions for metabolic carboxylate ions that are derivatives of glutaric acid is incorrect? a. Citrate contains a hydroxyl group and two carboxyl groups. b. Citrate has a 3– charge. c. α -Ketoglutarate contains five carbon atoms and a keto group. d. no correct response

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Organic And Biological Chemistry

7th Edition
STOKER + 1 other
Publisher: Cengage Learning,
ISBN: 9781305081079

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Chapter
Section
BuyFindarrow_forward

Organic And Biological Chemistry

7th Edition
STOKER + 1 other
Publisher: Cengage Learning,
ISBN: 9781305081079
Chapter 12.4, Problem 2QQ
Textbook Problem
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Which of the following structural descriptions for metabolic carboxylate ions that are derivatives of glutaric acid is incorrect?

  1. a. Citrate contains a hydroxyl group and two carboxyl groups.
  2. b. Citrate has a 3– charge.
  3. c. α-Ketoglutarate contains five carbon atoms and a keto group.
  4. d. no correct response

Interpretation Introduction

Interpretation: To identify the incorrect statement regarding structural descriptions for metabolic carboxylate ions those are derivatives of glutaric acid.

Concept introduction: There are a number of metabolic reaction that occur in the human body for completion of functions. During these metabolic reactions, the various metabolic intermediates are formed for the short time to complete the reactions. Polyfunctional carboxylate ions are also the metabolic intermediate formed during metabolic pathways.

Polyfunctional carboxylate ions act as a substrate in the metabolic pathways and can be divided into two parts depending upon the parent carboxylic acid.

The first class consists of malate, oxaloacetate and fumarate ion which are derivative of succinic acid. The second class consists of αketoglutarate and citrate ion which is a derivative of glutaric acid

Explanation of Solution

Reason for correct answer:

Polyfunctional carboxylate is divided into two parts depending upon the parent carboxylic acid.αketoglutarate and citrate ion belongs to the class whose parent acid is glutaric acid.

The chemical structures for carboxylate ion derived from glutaric acid are as follows:

Here, citrate ion consists of hydroxyl group and three carboxyl group in its structure. Hence, the correct option is (a)

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Organic And Biological Chemistry
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