ELECTRON TRANSPORT CHAIN

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ELECTRON TRANSPORT CHAIN


ELECTRON TRANSPORT CHAINVersión en línea ⚡️🚛🧬🫧 por Veronica Joyce 1 During electron transport, protons are pumped out of the mitochondrion at each of the major sites except for: a Complex I b Complex II c Complex III d Complex IV 2 In a eukaryotic cell, most of the enzymes of the electron transport chain are located in the.. a cytosol b Outer mitochondrial membrane. c Intermembrane space. d inner mitochondrial membrane. e Mitochondrial matrix. 3 After donating its electrons, NADH becomes: a NADP+ b ATP c NAD+ d FAD 4 Which statement is TRUE about Coenzyme Q? a It pumps H+ ions and makes ATP. b It carries electron from Complex 1 to Complex 2. c It receives electrons only from Complex 1. d It carries electrons from Complex 1 and 2 to Complex 3. 5 If 2 QH₂ molecules each release 2 H⁺ into the intermembrane space, how many H⁺ are released in total? a 2 H+ b 3 H+ c 4 H+ d 6 H+ 6 What is the lipid-soluble molecule that accepts electrons from Complex II and carries them to Complex III? Written answer 7 A transport protein that transfers electron to complex IV. Written answer 8 Formed due to the movement of hydrogen ions from the mitochondrial matrix to the intermembrane space. Written answer 9 It is where the complexes I, III, and IV pumps H+. Written answer 10 It is the final electron acceptor of the Electron Transport Chain. Written answer Feedback 1 (Complex II): The energy released from transferring electrons through Complex II is too low, so it lacks the power to pump protons. 3 (NAD⁺): NADH is an electron carrier; when it loses (donates) its electrons, it becomes oxidized back into its empty form, NAD⁺. 4 Coenzyme Q acts as a mobile traffic hub, collecting electrons from both Complex I and Complex II and delivering them to Complex III. 5 (4 H⁺): Each of the 2 individual molecules releases 2 protons, so you simply multiply them together (2 x 2 = 4) 6 (Coenzyme Q): This molecule is unique because it is a lipid, allowing it to dissolve and freely float inside the fatty core of the membrane. 7 (Cytochrome c): Unlike Coenzyme Q, Cytochrome c is a water-soluble peripheral protein that slides along the outside of the membrane to drop electrons off at Complex IV. 8 Pumping protons into a confined space creates a high concentration outside and a low concentration inside, forming a chemical gradient. 9 (Intermembrane Space): This is the narrow structural "waiting room" between the inner and outer membranes where protons are trapped to build up pressure. 10 Oxygen has a very high affinity for electrons; it pulls them to the very end of the chain and combines with protons to form harmless water (H2O)

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ELECTRON TRANSPORT CHAINVersión en línea

por Veronica Joyce

During electron transport, protons are pumped out of the mitochondrion at each of the major sites except for:

In a eukaryotic cell, most of the enzymes of the electron transport chain are located in the..

After donating its electrons, NADH becomes:

Which statement is TRUE about Coenzyme Q?

If 2 QH₂ molecules each release 2 H⁺ into the intermembrane space, how many H⁺ are released in total?

What is the lipid-soluble molecule that accepts electrons from Complex II and carries them to Complex III?

Written answer

A transport protein that transfers electron to complex IV.

Written answer

Formed due to the movement of hydrogen ions from the mitochondrial matrix to the intermembrane space.

Written answer

It is where the complexes I, III, and IV pumps H+.

Written answer

It is the final electron acceptor of the Electron Transport Chain.

Written answer

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