Exam 18: Oxidative Phosphorylation

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When glucose is totally oxidized to CO₂ and H₂O and the glycerol 3-phosphate shuttle is used, how many ATP molecules are made by oxidative phosphorylation (nonsubstrate-level phosphorylation) relative to the maximum yield?

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Question 1

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How does the glycerol 3-phosphate shuttle function?

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Question 2

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Electrons from NADH are transferred to DHAP, to form glycerol-3-P, a reaction that occurs in the cytosol. Glycerol-3-P diffuses through the outer membrane and then transfers the electrons to FAD in a reaction catalyzed by glycerol-3-phosphate dehydrogenase located in the inner membrane. The FADH₂ then transfers the electrons to Q.

_______________ is a molecular assembly in the inner mitochondrial membrane that carries out the synthesis of ATP.

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Question 3

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F₁F₀ ATPase, or ATP synthase,

The unequal distribution of H⁺ across the inner mitochondrial membrane creates a ________________ force.

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Question 4

Cytochrome ________ is the only water-soluble cytochrome of the electron-transport chain.

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Question 5

Acceptor control of oxidative phosphorylation means that the rate of respiration depends upon the level of __________.

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Question 6

In prokaryotes the site of ATP-synthesizing machinery is

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Question 7

What is the chemical effect of oligomycin on aerobic metabolism?

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Question 8

What is a cytochrome?

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Question 9

Cytochrome c oxidase contains two heme A groups and three ______________ ions.

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Question 10

What is the currently accepted model which explains the presence of mitochondria in eukaryotic cells? What is the best evidence which supports this model?

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Question 11

How is oxidative phosphorylation regulated?

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Question 12

What is the reaction of ATP synthase?

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Question 13

What is the net ATP obtained from one cytoplasmic NADH when it is reoxidized by the electron-transport chain using the glycerol 3-phosphate shuttle?

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Question 14

What are uncoupling agents? Provide an example of when these might be useful.

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Question 15

What term is used to describe an ATP-generating process in which an inorganic substance such as oxygen serves as the ultimate electron acceptor?

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Question 16

Choose the correct path taken by a pair of electrons as it travels down the electron-transport chain.

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Question 17

Which of the following does not pump protons?

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Question 18

Which enzyme catalyzes the reduction of oxygen to water?

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Question 19

Which electron carrier has an isoprenoid tail?

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Question 20

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Exam 18: Oxidative Phosphorylation

When glucose is totally oxidized to CO2 and H2O and the glycerol 3-phosphate shuttle is used, how many ATP molecules are made by oxidative phosphorylation (nonsubstrate-level phosphorylation) relative to the maximum yield?

How does the glycerol 3-phosphate shuttle function?

_______________ is a molecular assembly in the inner mitochondrial membrane that carries out the synthesis of ATP.

The unequal distribution of H+ across the inner mitochondrial membrane creates a ________________ force.

Cytochrome ________ is the only water-soluble cytochrome of the electron-transport chain.

Acceptor control of oxidative phosphorylation means that the rate of respiration depends upon the level of __________.

In prokaryotes the site of ATP-synthesizing machinery is

What is the chemical effect of oligomycin on aerobic metabolism?

What is a cytochrome?

Cytochrome c oxidase contains two heme A groups and three ______________ ions.

What is the currently accepted model which explains the presence of mitochondria in eukaryotic cells? What is the best evidence which supports this model?

How is oxidative phosphorylation regulated?

What is the reaction of ATP synthase?

What is the net ATP obtained from one cytoplasmic NADH when it is reoxidized by the electron-transport chain using the glycerol 3-phosphate shuttle?

What are uncoupling agents? Provide an example of when these might be useful.

What term is used to describe an ATP-generating process in which an inorganic substance such as oxygen serves as the ultimate electron acceptor?

Choose the correct path taken by a pair of electrons as it travels down the electron-transport chain.

Which of the following does not pump protons?

Which enzyme catalyzes the reduction of oxygen to water?

Which electron carrier has an isoprenoid tail?

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When glucose is totally oxidized to CO₂ and H₂O and the glycerol 3-phosphate shuttle is used, how many ATP molecules are made by oxidative phosphorylation (nonsubstrate-level phosphorylation) relative to the maximum yield?

The unequal distribution of H⁺ across the inner mitochondrial membrane creates a ________________ force.