Biology 1002B Lecture Notes - Lecture 10: Pyruvate Dehydrogenase Complex, Atp Synthase, Uncoupling Protein

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2 May 2016

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Relative location of electron transport chain components relative to mitochondrial membrane, matrix, intermembrane space. Etc occurs in the inner membrane that faces the matrix of the mitochondria and protons move from the intermembrane space matrix back and forth. Oxygen in electron transport acts as the electron acceptor in the transport chain; when electrons go through the protein complexes, oxygen is at the end to accept the final electron. The oxygen then binds with h+ to make water: role of nadh in electron transport. The nadh in electron transport chain is what supplies the chain with electrons. It has a very low redox potential; therefore it is extremely easy to oxidize": role of cofactors in etc. Electron"s energy is used to pump h+ ions from matrix to intermembrane space. In order for those protons to get back in the matrix, they go through the atp synthase pump.

Related Questions

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 ____________ .

1.) Certain complexes of the mitochondrial electron transport chain pump protons. Which of the following BEST describes the movement of protons in this situation?

a.) across the outer mitochondrial membrane, from the cytoplasm to the intermembrane space

b.) across the outer mitochondrial membrane, from the intermembrane space to the cytoplasm

c.) across the inner mitochondrial membrane, from the intermembrane space to the matrix

d.) across the inner mitochondrial membrane, from the matrix to the inter membrane space

2.) Which regulatory mechanism is activated when the overall energy availability of a cell is high?

a.) Citrate inhibits phosphofructokinase-1.

b.) ADP up-regulates phosphofructokinase-1.

c.) ATP inhibits phosphofructokinase-1.

d.) AMP up-regulates phosphofructokinase-1.

3.) Electron carriers are oxidized during which of the following reactions?

a.) glycolysis

b.) citric acid cycle

c.) electron transport chain

d.) the conversion of pyruvate to acetyl coA

e.) all of the above

purpleswan410

19. Which of the following is a component of Succinate dehydrogenase in Electron transport chain?

A. Niacin

B. FMN

C. FAD

D. Coenzyme Q

E. Lipoic acid

20. In electron transport the flow of electrons:

A. is bidirectional

B. goes from a high energy state to a low energy state

C. takes place in the outer mitochondrial membrane

D. are used to pump H+ into the mitochondrial matrix

21. Which of the following statements about the electron transport chain is NOT correct

A. It is located in the inner mitochondrion membrane

B. Cytochrome c accepts electrons from complex II

C. Cytochrome c oxidase (complex IV) accepts electrons from Cytochrome c

D. Complex I is called NADH dehydrogenase

E. Coenzyme Q accepts electrons from complex I and complex II

22. In the electron transport chain, the enzyme cytochrome C oxidase:

A. Uses H2O as a substrate

B. Produces HOOH as a product

C. Cannot function if oxygen is absent

D. Accepts electrons from hydrogen ions

E. Uses ADP and Pi as substrates

Biology 1002B Lecture Notes - Lecture 10: Pyruvate Dehydrogenase Complex, Atp Synthase, Uncoupling Protein

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