Each of the given chemical compounds should be identified as a part of the citric acid cycle, electron transport chain or both. Concept introduction: ► Citric acid cycle includes various reactions which occur in living cells during aerobic respiration. In this cycle, acetyl-CoA is oxidized for releasing carbon dioxide and energy in the form of ATP. ► Electron transport chain is the last step of aerobic respiration and includes a sequence of redox reactions which occur by transporting electrons along with hydrogen ions across the mitochondrial membrane. To identify: Each of the given compounds as a part of citric acid cycle, electron transport chain or both.

Question

Want to see more full solutions like this?

Answer 1

Question

Chapter 23, Problem 23.51UTC

Interpretation Introduction

Interpretation:

Each of the given chemical compounds should be identified as a part of the citric acid cycle, electron transport chain or both.

Concept introduction:

► Citric acid cycle includes various reactions which occur in living cells during aerobic respiration. In this cycle, acetyl-CoA is oxidized for releasing carbon dioxide and energy in the form of ATP.

► Electron transport chain is the last step of aerobic respiration and includes a sequence of redox reactions which occur by transporting electrons along with hydrogen ions across the mitochondrial membrane.

To identify: Each of the given compounds as a part of citric acid cycle, electron transport chain or both.

Expert Solution & Answer

Answer to Problem 23.51UTC

Solution:

(a) Citric acid cycle.

(b) Electron transport chain.

(c) Both citric acid cycle and electron transport chain.

(d) Electron transport chain.

(e) Citric acid cycle.

Explanation of Solution

(a) Succinate is a chemical species formed from Succinyl CoA during citric acid cycle. It produces fumarate after its reaction with succinic dehydrogenase.

For this reason, succinate is a part of citric acid cycle.

(b) $C o Q H_{2}$ is a chemical species that produces complex III along with cytochrome c reductase ( $C o Q H_{2}$ -cytochrome creductase complex) and helps in transfer of electrons.

For this reason, $C o Q H_{2}$ is a part of electron transport chain.

(c) FAD (Flavin adenine dinucleotide) is a cofactor of redox reactions. It helps in controlled redox reactions in both citric acid cycle and electron transport chain and releases energy as ATP.

For this reason, FADis a part of both citric acid cycle and electron transport chain.

(d) Cyt c (Fe²⁺) is a type of hemeprotein found in mitochondrial membrane. It participates in electron transport chain and helps in transfer of electrons.

For this reason, cyt c (Fe²⁺) is a part of electron transport chain.

(e) Citrate is a chemical species formed from acetyl-CoA during citric acid cycle. It produces cis-aconitate after its reaction with aconitase.

For this reason, α-ketoglutarate is a part of citric acid cycle.

Conclusion

Each of the given chemical compounds is identified as a part of citric acid cycle, electron transport chain or both.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Students have asked these similar questions

. (11pts total) Consider the arrows pointing at three different carbon-carbon bonds in the molecule depicted below. Bond B 2°C. +2°C. < cleavage Bond A • CH3 + 26. t cleavage 2°C• +3°C• Bond C Cleavage CH3 ZC '2°C. 26. E Strongest 3°C. 2C. Gund Largest BDE weakest bond In that molecule a. (2pts) Which bond between A-C is weakest? Which is strongest? Place answers in appropriate boxes. Weakest C bond Produces A Weakest Bond Most Strongest Bond Stable radical Strongest Gund produces least stable radicals b. (4pts) Consider the relative stability of all cleavage products that form when bonds A, B, AND C are homolytically cleaved/broken. Hint: cleavage products of bonds A, B, and C are all carbon radicals. i. Which ONE cleavage product is the most stable? A condensed or bond line representation is fine. 人 8°C. formed in bound C cleavage ii. Which ONE cleavage product is the least stable? A condensed or bond line representation is fine. methyl radical •CH3 formed in bund A Cleavage

Which carbocation is more stable?

Are the products of the given reaction correct? Why or why not?

Answer 2