Domanda del libro di testo
How many molecules of acetyl-CoA are produced by catabolism of the following fatty acids, and how many β oxidations are needed?
a. Palmitic acid, CH3(CH2)14COOH
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Ch.24 Lipid Metabolism
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- 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
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 24, Problema 6
Look back at the reactions of the citric acid cycle (Figure 21.8) and identify the three reactions in that cycle that are similar to the first three reactions of the β oxidation of a fatty acid.
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Guida verificata passo dopo passo1
Step 1: Recall the key reactions in the citric acid cycle (Krebs cycle). These include oxidation-reduction reactions, hydration reactions, and substrate-level phosphorylation. Focus on the reactions that involve the transformation of citrate to isocitrate, isocitrate to α-ketoglutarate, and α-ketoglutarate to succinyl-CoA.
Step 2: Review the first three reactions of β-oxidation of a fatty acid. These include: (1) oxidation of the fatty acyl-CoA to form a trans double bond (using FAD as a coenzyme), (2) hydration of the double bond to form a hydroxyl group, and (3) oxidation of the hydroxyl group to form a keto group (using NAD+ as a coenzyme).
Step 3: Compare the first reaction of β-oxidation (oxidation using FAD) to the citric acid cycle reaction where succinate is oxidized to fumarate using FAD. Both involve the formation of a double bond and the use of FAD as an electron carrier.
Step 4: Compare the second reaction of β-oxidation (hydration of the double bond) to the citric acid cycle reaction where fumarate is hydrated to malate. Both involve the addition of water across a double bond.
Step 5: Compare the third reaction of β-oxidation (oxidation of the hydroxyl group using NAD+) to the citric acid cycle reaction where malate is oxidized to oxaloacetate using NAD+. Both involve the oxidation of a hydroxyl group to a keto group and the use of NAD+ as an electron carrier.
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Citric Acid Cycle
The citric acid cycle, also known as the Krebs cycle, is a series of enzymatic reactions that occur in the mitochondria, where acetyl-CoA is oxidized to produce energy in the form of ATP, NADH, and FADH2. It plays a crucial role in cellular respiration, linking carbohydrate, fat, and protein metabolism.
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2:31
Citric Acid Cycle Summary Concept 12
Beta-Oxidation
Beta-oxidation is the metabolic process by which fatty acids are broken down in the mitochondria to generate acetyl-CoA, which can then enter the citric acid cycle. This process involves a series of reactions that sequentially remove two-carbon units from the fatty acid chain, producing NADH and FADH2 as energy carriers.
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02:32Characteristics of Beta Particles
Enzymatic Reactions
Enzymatic reactions are biochemical processes facilitated by enzymes, which are proteins that speed up chemical reactions without being consumed. In both the citric acid cycle and beta-oxidation, specific enzymes catalyze each step, ensuring the efficient conversion of substrates into products, and allowing for the regulation of metabolic pathways.
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3:09Triacylglycerol Reactions: Hydrolysis Concept 1
Pratica correlata
Domanda del libro di testo
Which of the following classifications apply to the formation of 3-hydroxybutyrate from acetoacetate?
a. Condensation
b. Hydrolysis
c. Oxidation
d. Reduction
1085
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Domanda del libro di testo
Cholesterol and cholate are sterols with very similar structures. However, the roles they play in the body are different: Cholate is an emulsifier, whereas cholesterol plays an important role in membrane structure. Identify the small differences in their structures that make them well suited to their jobs in the body. Given their similar structures, can the roles of these molecules be reversed?
1179
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Domanda del libro di testo
Consider the reactions of ketogenesis.
c. What is the essential role of ketone bodies during prolonged starvation?
755
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Domanda del libro di testo
Starting with acetyl-S-enzyme-1 and malonyl-CoA, how many molecules of acetyl-CoA are needed to synthesize an 18-carbon fatty acid (C18:0)? How many molecules of CO2 are released in this process?
988
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Domanda del libro di testo
How are long-chain fatty acids released from triacylglycerides transported through the bloodstream?
723
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