Biology 1002B Chapter Notes - Chapter 7: Inner Mitochondrial Membrane, Atp Synthase, Superoxide Dismutase

29 views14 pages

blushyak979

27 Jan 2016

School

Department

Course

Professor

For unlimited access to Textbook Notes, a Class+ subscription is required.

Document Summary

Following citric acid cycle: all carbon atoms originally present in glucose have been completely oxidized and released as co2: besides atp formed by substrate level phosphorylation, potential energy originally present in glucose now exists in. Role of etc/chemiosmosis: extract potential energy in nadh and. Respiratory etc: comprises system of components that in eukaryotes found in inner mitochondrial membrane: facilitates transfer of electrons from nadh2 and fadh2 to oxygen, consists of four protein complexes. Complex ii: succinate dehydrogenase single, peripheral membrane protein. Complex iv: cytochrome oxidase: complex i, iii and iv are composed of multiple proteins. Oxidative phosphorylation: the mitochondrial etc and atp synthase complex: etc includes 3 major complexes, smaller complexes, ubiquinone and cytochrome c act as shuttles. I, iii and iv between the major complexes: succinate dehydrogenase (complex ii): passes electrons to ubiquinone bypassing complex i, blue arrows indicate electron flow, red arrows indicate h+ movement.

Related Questions

Oxidative phosphorylation is the final stage of cellular respiration and the main pathway of aerobic energy generation from glucose. Which of the following statements is NOT true?

a. NADH and FADH2 are used as âinputâ into the electron transport chain

b. The electron transport chain produces a proton gradient across the inner mitochondrial membrane

c. FADH2 stores less energy than NADH

d. The electron transport chain is made up of several membrane protein complexes

e. ATP synthesis by chemiosmosis requires about 30 protons per ATP molecule

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

1. Compared to the generation of ATP by oxidative phosphorylation, what is a major difference in mechanism of ATP generation by substrate-level phosphorylation in glycolysis?

A. A proton gradient is not involved

B. The ATP produced has less energy content because oxygen was not involved.

C. Substrate level phosphorylation occurs in the inter-mitochondrial space

D. One can't generalize without knowing the substrate.

2. Which of the following statements is true?

A. Because the electrons in NADH are at a higher energy than the electrons in reduced ubiquinone, the NADH dehydrogenase complex can pump more protons than can the cytochrome b-c1 complex.

B.The pH in the mitochondrial matrix is higher than the pH in the intermembrane space.

C. The proton concentration gradient and the membrane potential across the inner mitochondrial membrane tend to work against each other in driving protons from the intermembrane space into the matrix.

D. The difference in proton concentration across the inner mitochondrial membrane has a much larger effect than the membrane potential on the total proton-motive force.

Biology 1002B Chapter Notes - Chapter 7: Inner Mitochondrial Membrane, Atp Synthase, Superoxide Dismutase

Document Summary

Get access

Related Documents

Biology 1002B Chapter Notes - Chapter 4.4: Nadh Dehydrogenase, Cytochrome C Oxidase, Oxidative Phosphorylation

Biology 1002B Chapter Notes - Chapter 6: Nadh Dehydrogenase, Oxidative Phosphorylation, Succinate Dehydrogenase

Biology 1002B Lecture Notes - Lecture 11: Cytochrome C Oxidase, Cytosol, Adipose Tissue

Related Questions