10 Questions
What is the ultimate 'electron sink' that drives the oxidation reactions in the electron transport chain?
Molecular O2
Which organelle is the main site of ATP synthesis?
Mitochondria
What is the purpose of the Proton Motive Force (PMF) generated by the electron transport chain?
Driving the synthesis of ATP
Which part of the mitochondria is impermeable to most molecules except those with specific transporters or channels?
Inner membrane
What are the high energy electrons carried by to generate a proton H+ gradient across the inner mitochondrial membrane?
NADH, FADH+
What is the ultimate function of the Electron Transport Chain (ETC)?
To generate a proton H+ gradient for ATP synthesis
Which organelle contains an outer membrane permeable to most small molecules via porins?
Mitochondria
What is the role of molecular O2 in the electron transport chain?
To act as the ultimate 'electron sink' driving the oxidation reactions
What is the main function of the inner mitochondrial membrane?
To house enzymes and ETC complexes
What drives the synthesis of ATP in the mitochondria?
Proton Motive Force (PMF)
Study Notes
Electron Transport Chain
- Oxygen is the ultimate 'electron sink' that drives the oxidation reactions in the electron transport chain.
- The purpose of the Proton Motive Force (PMF) generated by the electron transport chain is to drive ATP synthesis.
Mitochondria Structure
- The inner mitochondrial membrane is impermeable to most molecules except those with specific transporters or channels.
- The outer mitochondrial membrane is permeable to most small molecules via porins.
Electron Transport and ATP Synthesis
- High-energy electrons are carried by electron carriers (such as NADH and FADH2) to generate a proton (H+) gradient across the inner mitochondrial membrane.
- The ultimate function of the Electron Transport Chain (ETC) is to generate a proton gradient that drives ATP synthesis.
- The main function of the inner mitochondrial membrane is to facilitate the electron transport chain and ATP synthesis.
- The synthesis of ATP in the mitochondria is driven by the proton motive force generated by the electron transport chain.
Oxygen's Role
- Molecular O2 is the final electron acceptor, which receives the electrons at the end of the electron transport chain.
Test your knowledge of biochemistry with this quiz on the purpose of the Electron Transport Chain (ETC) in generating ATP. Explore how high-energy electrons drive the synthesis of ATP and the complete oxidation of glucose.
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