Skip to main content
Ch.12 Food as Fuel An Overview of Metabolism
Frost - General, Organic and Biological Chemistry 4th Edition
Frost4th EditionGeneral, Organic and Biological ChemistryISBN: 9780134988696당신이 사용하는 게 아니라요?교과서 변경
모든 교과서Frost 4th EditionCh.12 Food as Fuel An Overview of Metabolism문제 89
8장, 문제 89

How many ATP are produced when glucose is oxidized to pyruvate compared to when glucose is oxidized to CO2 and H2O?

검증된 단계별 안내
1
Step 1: Understand the two processes involved in glucose metabolism: glycolysis (oxidation of glucose to pyruvate) and cellular respiration (oxidation of glucose to CO₂ and H₂O). Glycolysis occurs in the cytoplasm, while cellular respiration occurs in the mitochondria.
Step 2: Recall that during glycolysis, glucose (C₆H₁₂O₆) is converted into two molecules of pyruvate (C₃H₄O₃). This process generates a net gain of 2 ATP molecules and 2 NADH molecules.
Step 3: For the complete oxidation of glucose to CO₂ and H₂O, the pyruvate produced in glycolysis enters the mitochondria and undergoes the citric acid cycle (Krebs cycle) and oxidative phosphorylation. Each NADH and FADH₂ generated in these processes contributes to ATP production via the electron transport chain.
Step 4: Recall the approximate ATP yield from cellular respiration: each NADH contributes about 2.5 ATP, and each FADH₂ contributes about 1.5 ATP. The complete oxidation of glucose to CO₂ and H₂O yields approximately 30-32 ATP molecules, depending on the efficiency of the electron transport chain.
Step 5: Compare the ATP yield: glycolysis alone produces 2 ATP, while the complete oxidation of glucose to CO₂ and H₂O produces significantly more ATP (30-32 ATP). This highlights the efficiency of cellular respiration in energy production.

비슷한 문제에 대한 검증된 영상 답변:

이 영상 해법은 위 문제에 도움이 된다고 튜터들이 추천한 것입니다.
영상 길이:
10m

주요 개념

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

Glycolysis

Glycolysis is the metabolic pathway that converts glucose into pyruvate, producing a net gain of 2 ATP molecules per glucose molecule. This process occurs in the cytoplasm and does not require oxygen, making it an anaerobic pathway. Glycolysis is the first step in cellular respiration and is crucial for energy production in both aerobic and anaerobic conditions.
추천 영상:
가이드 코스
1:26
Glycolysis Concept 5

Cellular Respiration

Cellular respiration is the process by which cells convert glucose into usable energy in the form of ATP. It consists of three main stages: glycolysis, the citric acid cycle, and oxidative phosphorylation. When glucose is fully oxidized to carbon dioxide and water, a total of approximately 30-32 ATP molecules can be produced, highlighting the efficiency of aerobic respiration compared to glycolysis alone.
추천 영상:
가이드 코스
1:47
Anaerobic Respiration Concept 1

ATP Yield

ATP yield refers to the amount of adenosine triphosphate (ATP) produced during metabolic processes. In the context of glucose oxidation, the yield varies significantly depending on the pathway: glycolysis yields 2 ATP, while complete oxidation through cellular respiration can yield up to 32 ATP. Understanding ATP yield is essential for comparing the energy efficiency of different metabolic pathways.
추천 영상:
가이드 코스
03:09
Percent Yield
관련 실천
교과서 질문

In what organ does the urea cycle take place?

745
views
교과서 질문

Name the reaction that removes nitrogen from an α-amino acid, forming an α-keto acid.

514
views
교과서 질문

What metabolic substrate(s) can be produced from the carbon atoms of each of the following amino acids?

c. methionine

554
views
교과서 질문

Identify the following as the reduced or oxidized form:

c. Q

1206
views
교과서 질문

What is the effect of proton accumulation in the intermembrane space?

1499
views
교과서 질문

Mammals can regulate their body heat through a process called thermogenesis. What part of metabolism changes to allow for the production of heat?

606
views