Textbook Question
What kind of reaction product might be a competitive inhibitor for the enzyme that catalyzes its formation?
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Ch.19 Enzymes and Vitamins
McMurry8th EditionFundamentals of GOBISBN: 9780134015187
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Table of contents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
Chapter 19, Problem 18b
Which vitamin provides us with each of the following?
b. Coenzyme A
Verified step by step guidance1
Understand the role of Coenzyme A: Coenzyme A is a molecule that plays a critical role in metabolism, particularly in the synthesis and oxidation of fatty acids and the oxidation of pyruvate in the citric acid cycle.
Identify the vitamin associated with Coenzyme A: Coenzyme A is derived from a specific B-vitamin, which is essential for its synthesis.
Recall the specific B-vitamin: The vitamin responsible for the formation of Coenzyme A is pantothenic acid, also known as Vitamin B5.
Connect the vitamin to its function: Pantothenic acid is a precursor for Coenzyme A, which is why it is crucial for energy production and metabolic processes in the body.
Summarize the answer: The vitamin that provides us with Coenzyme A is pantothenic acid (Vitamin B5).
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Vitamin B5 (Pantothenic Acid)
Vitamin B5, also known as pantothenic acid, is essential for synthesizing coenzyme A (CoA). CoA plays a critical role in fatty acid metabolism and the synthesis of neurotransmitters. It is involved in the Krebs cycle, which is vital for energy production in cells. A deficiency in vitamin B5 can lead to various metabolic issues, highlighting its importance in human nutrition.
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Coenzyme A Functionality
Coenzyme A is a crucial cofactor in biochemical reactions, particularly in the metabolism of fatty acids and carbohydrates. It facilitates the transfer of acyl groups, which are essential for synthesizing and breaking down fatty acids. CoA is also involved in the synthesis of acetylcholine, a neurotransmitter, and in the metabolism of certain amino acids, underscoring its diverse roles in cellular processes.
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Water-Soluble Vitamins
Water-soluble vitamins, including the B vitamins, are essential nutrients that dissolve in water and are not stored in the body. They must be consumed regularly through diet to maintain adequate levels. These vitamins play vital roles in energy production, metabolism, and the functioning of the nervous system. Understanding their importance helps in recognizing the consequences of deficiencies and the need for a balanced diet.
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Related Practice
Textbook Question
Which type of enzyme regulation is best for the following situations?
a. An enzyme that becomes overactive during a disease
b. An enzyme needed only when there is low blood glucose
c. An enzyme that springs into action when a traumatic injury occurs
d. An enzyme needed only during adolescence
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Textbook Question
Does the enzyme described in each of the following statements require a cofactor to be active?
c. The presence of K+ does not affect the reaction.
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Textbook Question
Compare the structures of vitamin A and vitamin C. Which one is water-soluble and which is fat-soluble? What structural features does each have that make one water-soluble and the other fat-soluble?
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Textbook Question
Based on the structure shown for retinol (vitamin A) and the names of the two related forms of vitamin A, retinal and retinoic acid, what do you expect to be the structural differences among these three compounds?
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Textbook Question
Vitamins are a diverse group of compounds that must be present in the diet. List four functions of vitamins in the body.
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