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Explain the role, positioning, mobility and contribution to the proton gradient of the stand-alone molecules and individual complexes of the mitochondrial electron transport chain

Explain the role of the components in the Q cycle in complex III: Cytochromes, ubiquinone and ubiquinol, iron-sulfur centers, NADH, FADH2

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Patrina Schowalter
Patrina SchowalterLv2
11 Jul 2019
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Related questions

15. The prosthetic group of NADH dehydrogenase:

A. FMN

B. NADH

C. FAD

D. NADPH

E. Iron

16. What type of reactions form the basis of the electron transport chain and what is the final electron acceptor?

A. Acid-base reactions; O2

B. Acid-base reactions; water

C. Oxidation-reduction reactions; water

D. Oxidation-reduction reactions; NADH

E. Oxidation-reduction reactions; O2

17. Which shows the proper order of electron transfer for the listed electron transport chain components (not all electron carriers are shown)?

A. NADH → → Q → → cytochrome c → → O2

B. O2 → → cytochrome c → → Q → → NADH

C. NADH → → cytochrome c → → Q → → O2

D. Q → → NADH → → cytochrome c → → O2

E. NADH → → O2 → → cytochrome c → → Q

18. Which complex oxidize NADH and FADH2 respectively in the electron transport chain

A. Complex I, Complex I

B. Complex I, Complex II

C. Complex II, Complex III

D. Complex II, Complex I

E. Complex II, Complex IV

We defined the oxidation and the reduction reactions involving NADH that are involved in Complex I of the electron transport chain. In light of our discussion, what are the oxidation and reduction reactions involving FADH2 for complex II? How does the ΔGo’ for this reaction relate to the energy needed for ATP production? What does this tell you about the role of complex II in the electron transport chain? Explain your answer.

use the following words: protons, NADH, electron gradient, ADP, FADH2, ATP, ATPsynthase, water, proton gradient, electrons

A molecule generated in both glycolysis and Krebs cycle, called ____________ , donates ____________ to the first protein in the electron transport chain.

At the same time, a molecule generated only in the Krebs cycle, called ____________ , donates ____________ to the second protein in the electron transport chain.

As the ____________ move through the transport chain, ____________ move through membrane proteins from the matrix to the intermembrane compartment.

At the end of the electron transport chain, ____________ bind to oxygen, forming ____________ .

The electron transport chain creates a(n) ____________ , which dissipates through an enzyme called ____________ .

As ____________ move through this enzyme, phosphate is added to ____________ , forming ____________ .

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