Biochemistry
Biochemistry
9th Edition
ISBN: 9781305961135
Author: Mary K. Campbell, Shawn O. Farrell, Owen M. McDougal
Publisher: Cengage Learning
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Chapter 20, Problem 1RE

RECALL Briefly summarize the steps in the electron transport chain from NADH to oxygen.

Expert Solution & Answer
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Interpretation Introduction

Interpretation:

The steps of the electron transport chain from NADH to oxygen are to be summarized.

Concept introduction:

Electron transport chain is the series of electron transfer from electron donor to electron acceptor; it is a redox reaction.

It is the last component of aerobic respiration and is the only reaction that utilizes atmospheric oxygen.

Answer to Problem 1RE

Solution: Following are the steps of the electron transport chain from NADH to oxygen:

NADHFMNCoQcytochrome acytochrome ccytochrome bcytochrome a3cytochrome aa3 complexOxygen

Explanation of Solution

First the electrons from NADH are transferred to the flavin-containing protein, flavin mononucleotide (FMN), and then to coenzyme-Q. The electrons from coenzyme-Q are transferred to various cytochrome complexes, starting with cytochrome b, to cytochrome c, then to cytochrome a, followed by cytochrome a3, and finally from cytochrome aa3 complex to oxygen.

Conclusion

Oxygen is the last electron acceptor that accepts electrons from cytochrome aa3 complex and consequently forms water molecules.

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Chapter 20 Solutions

Biochemistry

Ch. 20 - MATHEMATICAL Calculate E for the following...Ch. 20 - Prob. 12RECh. 20 - MATHEMATICAL Which is more favorable...Ch. 20 - REFLECT AND APPLY Comment on the fact that the...Ch. 20 - RECALL What do cytochromes have in common with...Ch. 20 - RECALL How do the cytochromes differ from...Ch. 20 - RECALL Which of the following does not play a role...Ch. 20 - Prob. 18RECh. 20 - Prob. 19RECh. 20 - REFLECT AND APPLY Two biochemistry students are...Ch. 20 - REFLECT AND APPLY Cytochrome oxidase and...Ch. 20 - Prob. 22RECh. 20 - REFLECT AND APPLY Reflect on the evolutionary...Ch. 20 - REFLECT AND APPLY Experimental evidence strongly...Ch. 20 - Prob. 25RECh. 20 - REFLECT AND APPLY What is the advantage of having...Ch. 20 - REFLECT AND APPLY Why do the electron-transfer...Ch. 20 - Prob. 28RECh. 20 - Prob. 29RECh. 20 - Prob. 30RECh. 20 - RECALL Describe the role of the F1 portion of ATP...Ch. 20 - Prob. 32RECh. 20 - Prob. 33RECh. 20 - Prob. 34RECh. 20 - REFLECT AND APPLY What is the approximate P/O...Ch. 20 - REFLECT AND APPLY Why is it difficult to determine...Ch. 20 - REFLECT AND APPLY What are some of the...Ch. 20 - RECALL Briefly summarize the main arguments of the...Ch. 20 - Prob. 39RECh. 20 - Prob. 40RECh. 20 - Prob. 41RECh. 20 - Prob. 42RECh. 20 - REFLECT AND APPLY Criticize the following...Ch. 20 - Prob. 44RECh. 20 - Prob. 45RECh. 20 - Prob. 46RECh. 20 - RECALL How does the yield of ATP from complete...Ch. 20 - REFLECT AND APPLY The malate-aspartate shuttle...Ch. 20 - MATHEMATICAL What yield of ATP can be expected...Ch. 20 - MATHEMATICAL The free-energy change (G) for the...
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