Respiration - Chemiosmosis

Why Do Organisms Need Oxygen - Pt. 2

By David Fink

​Electron Transport Chain

​Electron Transport Chain: a series of protein complexes that transfer electrons from electron donors to electron acceptors via redox reactions and couples this electron transfer with the transfer of protons across a membrane in the mitochondria

Open Ended

Use the I² format to analyze this this model of the Electron Transport Chain. Write at least 3 "I see..." -> "It means..." statements.

Multiple Choice

Which option would make the most sense as the location in the mitochondria of the electron transport chain we see in Model 1?

• A

• B

• C

Multiple Choice

Identify the region in Model 1 where the highest concentration of hydrogen ions (H⁺) are located.

• Outer Mitochondrial Membrane

• Intermembrane Space

• Inner Mitochondrial Membrane

• Mitochondrial Matrix

Open Ended

Explain why energy is required to move the hydrogen ions across the membrane in the direction indicated in Model 1.

Open Ended

High potential energy electrons provide the energy necessary to pump hydrogen ions across the inner mitochondrial membrane.

What molecules carry these high potential energy electrons?

Open Ended

High potential energy electrons provide the energy necessary to pump hydrogen ions across the inner mitochondrial membrane.

Where did these electron acceptor molecules come from?

Open Ended

High potential energy electrons provide the energy necessary to pump hydrogen ions across the inner mitochondrial membrane.

When the electrons are released from the electron acceptor molecules, what else is produced?

Open Ended

What molecules are the final electron acceptor after the electron has moved through the electron transport chain?

Open Ended

What compound is formed as a final product of the electron transport chain?

Multiple Choice

Is any ATP produced in the electron transport chain?

• Yes

• No