교과서 질문
Which of the following molecules will produce the most ATP per mole?
d. lauric acid (C12) or palmitic acid (C16)
721
views
Ch.18 Metabolic Pathways and ATP Production
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249
당신이 사용하는 게 아니라요?교과서 변경다른 교과서를 선택하세요
TOC.tableOfContents
- Ch.1 Chemistry in Our Lives19
- Ch.2 Chemistry and Measurements80
- Ch.3 Matter and Energy53
- Ch.4 Atoms and Elements58
- Ch.5 Nuclear Chemistry42
- Ch.6 Ionic and Molecular Compounds57
- Ch.7 Chemical Quantities and Reactions38
- Ch.8 Gases30
- Ch.9 Solutions50
- Ch.10 Acids and Bases and Equilibrium64
- Ch.11 Introduction to Organic Chemistry: Hydrocarbons77
- Ch.12 Alcohols, Thiols, Ethers, Aldehydes, and Ketones82
- Ch.13 Carbohydrates54
- Ch.14 Carboxylic Acids, Esters, Amines, and Amides91
- Ch.15 Lipids61
- Ch.16 Amino Acids, Proteins, and Enzymes84
- Ch.17 Nucleic Acids and Protein Synthesis86
- Ch.18 Metabolic Pathways and ATP Production73
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249당신이 사용하는 게 아니라요?교과서 변경
18장, 문제 98e
Which of the following molecules will produce the most ATP per mole?
e. α-ketoglutarate or fumarate in one turn of the citric acid cycle
검증된 단계별 안내1
Understand the context: The citric acid cycle (also known as the Krebs cycle) is a central metabolic pathway that generates energy in the form of ATP, NADH, and FADH₂. Each intermediate in the cycle contributes differently to the production of ATP.
Identify the molecules in question: α-ketoglutarate and fumarate are intermediates in the citric acid cycle. α-ketoglutarate is converted to succinyl-CoA, while fumarate is converted to malate in subsequent steps of the cycle.
Analyze the energy yield of each molecule: The conversion of α-ketoglutarate to succinyl-CoA produces one molecule of NADH. NADH is later used in the electron transport chain to generate approximately 2.5 ATP. Additionally, the conversion of succinyl-CoA to succinate generates one molecule of GTP (equivalent to 1 ATP).
Compare this to fumarate: The conversion of fumarate to malate does not directly produce NADH, FADH₂, or ATP. However, the subsequent conversion of malate to oxaloacetate produces one molecule of NADH, which generates approximately 2.5 ATP in the electron transport chain.
Conclude: Since α-ketoglutarate produces both NADH and GTP (equivalent to ATP) in its conversion to succinyl-CoA and succinate, it yields more ATP per mole compared to fumarate, which only indirectly contributes to ATP production through NADH formation in a later step.
비슷한 문제에 대한 검증된 영상 답변:
이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
4m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Citric Acid Cycle
The citric acid cycle, also known as the Krebs cycle, is a key metabolic pathway that occurs in the mitochondria. It involves a series of enzymatic reactions that convert acetyl-CoA into carbon dioxide and high-energy electron carriers, such as NADH and FADH2. These carriers are crucial for ATP production in the electron transport chain, making the cycle essential for cellular respiration.
추천 영상:
가이드 코스
2:31
Citric Acid Cycle Summary Concept 12
ATP Yield from Metabolites
Different metabolites yield varying amounts of ATP when oxidized. For instance, α-ketoglutarate and fumarate are intermediates in the citric acid cycle, but their ATP yield differs based on the number of high-energy electron carriers produced during their conversion. Understanding the specific ATP yield from each metabolite helps in determining which one is more efficient in energy production.
추천 영상:
가이드 코스
03:09Percent Yield
Oxidative Phosphorylation
Oxidative phosphorylation is the final stage of cellular respiration, where the energy from electron carriers (NADH and FADH2) is used to generate ATP. This process occurs in the inner mitochondrial membrane and involves the electron transport chain and ATP synthase. The efficiency of ATP production from different substrates in the citric acid cycle is ultimately linked to how effectively their electrons are transferred through this pathway.
추천 영상:
가이드 코스
0:51Oxidative Phosphorylation Concept 2