객관식
Which product of the Krebs cycle is also used as a reactant in the Krebs cycle?
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12. Microbial Metabolism
Krebs Cycle
3:02분문제 5
교과서 질문
Which of the following is the best definition of the Krebs cycle?
a. The oxidation of pyruvic acid
b. The way cells produce CO2
c. A series of chemical reactions in which NADH is produced from the oxidation of pyruvic acid
d. A method of producing ATP by phosphorylating ADP
e. A series of chemical reactions in which ATP is produced from the oxidation of pyruvic acid
검증된 단계별 안내1
Step 1: Understand the context of the Krebs cycle, also known as the citric acid cycle or TCA cycle, which is a key metabolic pathway in cellular respiration.
Step 2: Recall that the Krebs cycle involves a series of chemical reactions that take place in the mitochondrial matrix, where acetyl-CoA (derived from pyruvic acid) is oxidized.
Step 3: Identify the main products of the Krebs cycle, which include NADH, FADH₂, ATP (or GTP), and CO₂ as a byproduct.
Step 4: Note that the Krebs cycle's primary role is to generate high-energy electron carriers (NADH and FADH₂) by oxidizing acetyl-CoA, which then feed into the electron transport chain for further ATP production.
Step 5: Compare the given options to this understanding, focusing on the description that best captures the series of chemical reactions producing NADH from the oxidation of pyruvic acid derivatives.
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3m주요 개념
질문에 올바르게 답하기 위해 반드시 이해해야 하는 핵심 개념들은 다음과 같습니다.
Krebs Cycle Overview
The Krebs cycle, also known as the citric acid cycle, is a series of enzyme-catalyzed chemical reactions in the mitochondrial matrix that oxidize acetyl-CoA derived from pyruvic acid. It plays a central role in cellular respiration by generating electron carriers like NADH and FADH2, which are essential for ATP production.
추천 영상:
01:37
Krebs Cycle
Role of NADH in Cellular Respiration
NADH is a key electron carrier produced during the Krebs cycle by the oxidation of substrates like pyruvic acid. It transports high-energy electrons to the electron transport chain, where these electrons help drive the production of ATP through oxidative phosphorylation.
추천 영상:
07:50Review of Aerobic Cellular Respiration
ATP Production and Phosphorylation
ATP is the primary energy currency of the cell, produced mainly through oxidative phosphorylation in the electron transport chain. While the Krebs cycle generates some ATP (or GTP) directly, its main function is to produce NADH and FADH2, which fuel the larger ATP production process.
추천 영상:
06:44ATP
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