Chapter 14: Energy Generation in Mitochondria

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Last updated 9:03 PM on 4/28/26
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17 Terms

1
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mitochondria functions

-energy production

-apoptosis

2
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mitochondria structure

-outer membrane

-folded inner membrane

-intermembrane space

-matrix

<p>-outer membrane</p><p>-folded inner membrane</p><p>-intermembrane space</p><p>-matrix</p>
3
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electron transport chain (ETC)

-creates a proton gradient that stores energy which is used as a fuel source to produce ATP

-part of oxidative phosphorylation

-happens in the mitochondria

<p>-creates a proton gradient that stores energy which is used as a fuel source to produce ATP</p><p>-part of oxidative phosphorylation</p><p>-happens in the mitochondria</p>
4
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what is the purpose of the electron transport chain

to make a proton gradient

5
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oxidative phosphorylation

-The production of ATP using energy derived from the redox reactions of an electron transport chain

-the third major stage of cellular respiration.

-happens in the mitochondria

-REQUIRES A MEMBRANE

<p>-The production of ATP using energy derived from the redox reactions of an electron transport chain</p><p>-the third major stage of cellular respiration.</p><p>-happens in the mitochondria</p><p>-REQUIRES A MEMBRANE</p>
6
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two main parts of oxidative phosphorylation

-electron transport chain

-energy generation via chemiosmosis

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NADH role in oxidative phosphorylation

-donates electrons via a hydride (H-) ion to the ETC

-makes 2e- and NAD+

8
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4 major complexes in ETC

-NADH dehydrogenase complex (complex 1)

-succinate dehydrogenase complex (complex 2)

-Cytochrome reductase complex (complex 3)

-Cytochrome oxidase complex (complex 4)

<p>-NADH dehydrogenase complex (complex 1)</p><p>-succinate dehydrogenase complex (complex 2)</p><p>-Cytochrome reductase complex (complex 3)</p><p>-Cytochrome oxidase complex (complex 4)</p>
9
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which of the four complexes function as proton pumps in the ETC

NADH dehydrogenase, Cytochrome reductase, and Cytochrome oxidase complexes (complexes 1, 3, and 4)

10
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which of the four complexes in the ETC collects electrons from FADH2 and provides energy for the ETC

succinate dehydrogenase complex (complex 2)

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NADH dehydrogenase complex

-first complex in ETC

-accepts electrons from NADH

-protons driven from matrix to intermembrane space

-electrons (two produced per NADH) picked up by ubiquinone and transported to next pump (complex 3)

<p>-first complex in ETC</p><p>-accepts electrons from NADH</p><p>-protons driven from matrix to intermembrane space</p><p>-electrons (two produced per NADH) picked up by ubiquinone and transported to next pump (complex 3)</p>
12
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Succinate dehydrogenase complex

-second complex in ETC

-accepts electrons from FADH2

-does NOT pump protons

-electrons picked up by ubiquinone and moved to complex 3

<p>-second complex in ETC</p><p>-accepts electrons from FADH2</p><p>-does NOT pump protons</p><p>-electrons picked up by ubiquinone and moved to complex 3</p>
13
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Cytochrome reductase complex

-third complex of the ETC

-electrons dropped off by ubiquinone

-proton pump

-electrons picked up by cytochrome c and moved to complex 4

<p>-third complex of the ETC</p><p>-electrons dropped off by ubiquinone</p><p>-proton pump</p><p>-electrons picked up by cytochrome c and moved to complex 4</p>
14
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Cytochrome oxidase complex

-fourth complex of ETC

-electrons dropped off by cytochrome c

-electrons moved by copper to an oxygen-binding complex, producing water. THIS IS WHY OXYGEN IS REQUIRED FOR KREBS CYCLE!

<p>-fourth complex of ETC</p><p>-electrons dropped off by cytochrome c</p><p>-electrons moved by copper to an oxygen-binding complex, producing water. THIS IS WHY OXYGEN IS REQUIRED FOR KREBS CYCLE!</p>
15
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ATP synthase

Large protein that uses energy from H+ ions (from the proton gradient produced in ETC) to bind ADP and a phosphate group together to produce ATP

<p>Large protein that uses energy from H+ ions (from the proton gradient produced in ETC) to bind ADP and a phosphate group together to produce ATP</p>
16
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F0 rotor

H+ ions wrap around the complex

<p>H+ ions wrap around the complex</p>
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F1 ATPase head

Picks up ADP and kicks out ATP

<p>Picks up ADP and kicks out ATP</p>