According to the KEGG pathway for oxidative phosphorylation, which of the follow

Question

According to the KEGG pathway for oxidative phosphorylation, which of the following enzymes do NOT shuttle protons into the mitochondrial intermembrane space (IMS)?

A.1.3.5.1

B. 1.3.5.1 and 3.6.3.6

C. 1.6.5.3 and 1.10.2.2

D. 3.6.3.3

According to the stoichiometry indicated on the KEGG pathway, _____ matrix protons are consumed and _____ are transported to the IMS during the reaction catalyzed by Complex I.

A. 6; 4

B. 4; 6

C. 2; 6

D. 2; 4

According on the KEGG pathway and Chapter 15, Complex III transports ___ protons to the IMS per substrate molecule using ___ of the Q cycle.

A. 4; both cycles

B. 2; both cycles

C. 4; only 1 cycle

D. 2; only 1 cycle

Which of the following statements best describes the oval-shaped arrows involving UQ and UQH2, which are located within the membrane in the colorful KEGG diagram?

A. The quinone pool is loosely bound within the membrane, where UQ serves as a substrate for Complexes I and II.

B. The quinone pool is loosely bound within the membrane, where UQ serves as a substrate for Complex III.

C. The quinone pool is loosely bound within the membrane, where UQH2 serves as a substrate for Complexes I and II.

D. The quinone pool remains tightly bound to the membrane surface, where UQ serves as a substrate for Complexes I and II.

The KEGG and NCBI databases contain a wealth of information obtained from sequencing and analyzing the complete genome of Acinetobacter baumannii 1656-2, which is a medically important oxidase-negative (cytochrome c oxidase–negative) bacterium that is multidrug resistant. For this microorganism, which statement regarding oxidative phosphorylation is correct?

A. This microbe possesses subunits for cytochrome c oxidase and therefore displays cytochrome c oxidase activity.

B. The formation of ATP depends directly on the oxidation of cytochrome c.

C. The cytochrome bd complex allows oxygen to be reduced by the quinone pool.

D. Subunit a of the F-type ATPase has 876 amino acids.

Explanation / Answer

1.3.5.1, this protein is succinate dehydrogenase which doesnt pump protons to the IMS

According to the stoichiometry indicated on the KEGG pathway, two matrix protons are consumed and four are transported to the IMS during the reaction catalyzed by Complex I.

According on the KEGG pathway and Chapter 15, Complex III transports 2 protons to the IMS per substrate molecule using one of the Q cycle.

A. The quinone pool is loosely bound within the membrane, where UQ serves as a substrate for Complexes I and II. ( UQ picks up electrons from these complexes, gets reduced and transports the electron to the complexIII)

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