Skip to main content
Ch.18 Metabolic Pathways and ATP Production
Timberlake - Chemistry: An Introduction to General, Organic, and Biological Chemistry 14th Edition
Timberlake14th EditionChemistry: An Introduction to General, Organic, and Biological ChemistryISBN: 9781292472249당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Timberlake 14th EditionCh.18 Metabolic Pathways and ATP Production문제 98b
18장, 문제 98b

Which of the following molecules will produce the most ATP per mole?
b. glucose or two pyruvate

검증된 단계별 안내
1
Step 1: Understand the context of ATP production. ATP (adenosine triphosphate) is the primary energy currency in cells, and its production is closely tied to cellular respiration processes such as glycolysis, the citric acid cycle, and oxidative phosphorylation.
Step 2: Recall the metabolic pathways involved. Glucose undergoes glycolysis, producing two pyruvate molecules, along with a net gain of 2 ATP and 2 NADH. Pyruvate can then enter the mitochondria for further processing in the citric acid cycle and oxidative phosphorylation.
Step 3: Compare the ATP yield from glucose versus two pyruvate molecules. Glucose is the starting molecule for glycolysis, which produces two pyruvate molecules. The ATP yield from glucose includes the ATP generated during glycolysis, the citric acid cycle, and oxidative phosphorylation. Two pyruvate molecules bypass glycolysis and directly enter the citric acid cycle, contributing ATP only from the citric acid cycle and oxidative phosphorylation.
Step 4: Consider the additional energy contributions. Glucose provides more ATP overall because it includes the ATP generated during glycolysis, whereas two pyruvate molecules do not contribute the ATP from glycolysis.
Step 5: Conclude the comparison. Glucose will produce more ATP per mole compared to two pyruvate molecules because it undergoes glycolysis in addition to the citric acid cycle and oxidative phosphorylation.

주요 개념

질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.

Cellular Respiration

Cellular respiration is the metabolic process by which cells convert nutrients into energy, specifically ATP. It involves several stages, including glycolysis, the Krebs cycle, and oxidative phosphorylation. Understanding this process is crucial for determining how different molecules, like glucose and pyruvate, contribute to ATP production.
추천 영상:
가이드 코스
1:47
Anaerobic Respiration Concept 1

ATP Yield from Glucose vs. Pyruvate

Glucose, when fully oxidized through cellular respiration, can yield up to 30-32 ATP molecules per molecule, while pyruvate, which is produced from glucose during glycolysis, can yield significantly less ATP when further metabolized. This difference in ATP yield is essential for comparing the energy potential of these two molecules.
추천 영상:
가이드 코스
2:21
Total Energy From Glucose Example 1

Glycolysis and Fermentation

Glycolysis is the initial step in glucose metabolism, breaking down glucose into two pyruvate molecules and producing a net gain of 2 ATP. If oxygen is not available, pyruvate can undergo fermentation, which does not produce additional ATP. Understanding these pathways helps clarify why glucose is generally more efficient for ATP production than pyruvate alone.
추천 영상:
가이드 코스
1:26
Glycolysis Concept 5
관련 실천
교과서 질문

Which of the following molecules will produce the most ATP per mole?

a. glucose or stearic acid (C18)

1226
views
교과서 질문

Which of the following molecules will produce the most ATP per mole?

d. glucose or caprylic acid (C8)

651
views
교과서 질문

Which of the following molecules will produce the most ATP per mole?

d. lauric acid (C12) or palmitic acid (C16)

721
views
교과서 질문

Which of the following molecules will produce the most ATP per mole?

a. glucose or maltose

573
views
교과서 질문

Which of the following molecules will produce the most ATP per mole?

d. lauric acid (C12) or palmitic acid (C16)

45
views
교과서 질문

Which of the following molecules will produce the most ATP per mole?

c. two acetyl CoA or one palmitic acid (C16)

29
views