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what is the relationship in mitochondria between changes in the pH of the intermembrane space and the production ATP by ATP synthase?

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Trinidad Tremblay
Trinidad TremblayLv2
28 Sep 2019

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Related questions

Consider a reconstituted membrane system that mimics the structure of intact mitochondria in that the matrix and intermembrane space are completely intact. These membranes are formed with only Complex IV and ATp synthase in their normal orientation within the membrane. Electrons are provided into the system via soluble reduced cytochrome c and O2 is used as an electron acceptor. Would ATP synthesis occur? Justify your answer.

In a thylakoid membrane, absorbed light energy is passed from one chlorophyll molecule to another until it is:

Select one:

a. dissipated as heat.

b. released as fluorescence

c. passed to a reaction center.

Question 2

Protons in a chloroplast flow through an ATP synthase from the:

Select one:

a. cytoplasm to the intermembrane space.

b. stroma to the intermembrane space.

c. thylakoid lumen to the stroma.

d. stroma to the thylakoid lumen.

e. intermembrane space to the stroma.

Question 3

Which of the following are produced directly as a result of the movement of electrons through the photosynthetic electron transport chain?

Select one:

a. oxygen and carbohydrates

b. carbohydrates and ATP

c. ATP and NADPH

d. water and carbohydrates

Question 4

If a mutation occurs such that photosystem II no longer functions as efficiently as it should, what might be most directly affected?

Select one:

a. The amount of H2O produced.

b. The rate at which NADPH is produced.

c. The rate at which protons are transported into the stroma.

d. The rate of ATP synthesis by ATP synthase in the chloroplast.

Brown fat, which is common in human infants, is specialized for the production of heat to keep the infant warm. Mitochondria in brown fat produce a protein known as thermogenin (UCP1) that associateswith the inner mitochondrial membrane and rapidly transports H+ from the intermembrane space back to the mitochondrial matrix, thus bypassing the ATP Synthase complex. Mitochondrial electron transport occurs normally in brown fat. It has been shown that thermogenin is necessary for heat production by brown fat. Explain how thermogenin might cause increased heat production by brown fat?

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