Quick 10Q: Oxidative Phosphorylation

Front

What is oxidative phosphorylation?

Back

A metabolic pathway that uses energy released by the electron transport chain to power ATP synthesis.

Front

Where does oxidative phosphorylation occur in the cell?

Back

In the inner mitochondrial membrane.

Front

What is the role of the electron transport chain in oxidative phosphorylation?

Back

To transfer electrons from electron donors to electron acceptors via redox reactions, creating a proton gradient.

Front

What is the significance of the proton gradient in oxidative phosphorylation?

Back

It drives the synthesis of ATP through ATP synthase.

Front

What is ATP synthase?

Back

An enzyme that synthesizes ATP from ADP and inorganic phosphate using the energy from the proton gradient.

Front

What happens to protons during the electron transport chain?

Back

They are pumped from the mitochondrial matrix into the intermembrane space.

Front

What is the function of oxygen in oxidative phosphorylation?

Back

Oxygen acts as the final electron acceptor in the electron transport chain.

Front

What is the effect of uncouplers on oxidative phosphorylation?

Back

They disrupt the proton gradient, leading to heat generation instead of ATP synthesis.

Front

How does the mitochondrial matrix differ from the intermembrane space in terms of pH?

Back

The mitochondrial matrix has a higher pH (more alkaline) compared to the intermembrane space.

Front

What would happen if the inner mitochondrial membrane was damaged?

Back

ATP synthesis would be inhibited due to the loss of the proton gradient.