11 Questions
What is the last stage of cellular respiration where products from the Krebs cycle and glycolysis feed into?
Electron transport chain
What is formed when high-energy electrons from glycolysis are passed to NAD+?
NADH
Where do NADH molecules join the NADH and FADH2 molecules generated by the Krebs cycle?
Mitochondrion
What does the electron transport chain use to synthesize ATP from ADP?
High-energy electrons from glycolysis and the Krebs cycle
What is the final electron acceptor of the electron transport chain?
Oxygen
Explain the role of oxygen in the electron transport chain and why electron transport is considered aerobic.
Oxygen is the final electron acceptor of the electron transport chain. It accepts low energy electrons at the end of the chain, allowing the chain to continue functioning. Electron transport is considered aerobic because it requires oxygen for this final step in the chain.
Describe how high-energy electrons from glycolysis and the Krebs cycle are utilized in the electron transport chain to synthesize ATP from ADP.
The high-energy electrons from glycolysis are passed to NAD+, forming NADH, while the NADH and FADH2 molecules generated by the Krebs cycle also contribute high-energy electrons. These electrons are then passed from carriers to the electron transport chain, which uses them to synthesize ATP from ADP.
Explain the composition and location of the electron transport chain in eukaryotic cells.
In eukaryotic cells, the electron transport chain is composed of a series of electron carriers located in the inner membrane of the mitochondrion. This is where the high-energy electrons from glycolysis and the Krebs cycle are utilized to synthesize ATP from ADP.
Explain the process of how high-energy electrons from glycolysis and the Krebs cycle are utilized in the electron transport chain to synthesize ATP from ADP.
High-energy electrons from glycolysis and the Krebs cycle are passed to NAD+ forming NADH, and then join the NADH and FADH2 molecules in the mitochondrion. These electrons are then passed through a series of electron carriers in the inner membrane of the mitochondrion and eventually used to synthesize ATP from ADP in the electron transport chain.
Describe how the electron transport chain in eukaryotes is composed and its location within the cell.
The electron transport chain in eukaryotes is composed of a series of electron carriers located in the inner membrane of the mitochondrion. These carriers facilitate the transfer of high-energy electrons from glycolysis and the Krebs cycle to ultimately synthesize ATP from ADP.
Explain the significance of oxygen as the final electron acceptor in the electron transport chain and the consequences of its absence.
Oxygen is the final electron acceptor of the chain, making electron transport aerobic. It accepts low-energy electrons at the end of the chain. Without oxygen, the electron transport chain cannot function, leading to a halt in ATP synthesis and ultimately disrupting cellular respiration.
Test your knowledge of cellular respiration and energy production with this quiz. Explore how products from the Krebs cycle and glycolysis feed into the electron transport chain, generating NADH and FADH
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