Multiple Choice
One function of vitamin A is to __________.
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24. Metabolism and Nutrition
Cellular Respiration: Electron Transport Chain
Multiple Choice
Which of the following processes contribute to the proton motive force during aerobic respiration?
A
Fermentation
B
Glycolysis
C
Krebs cycle
D
Electron transport chain
Verified step by step guidance1
Understand the concept of proton motive force: It is the force generated across a membrane due to the difference in proton concentration, which is crucial for ATP synthesis during aerobic respiration.
Identify the role of the electron transport chain: This is the final stage of aerobic respiration where electrons are transferred through a series of complexes, leading to the pumping of protons across the mitochondrial membrane.
Recognize that fermentation does not contribute to the proton motive force: Fermentation occurs in the absence of oxygen and does not involve the electron transport chain or proton pumping.
Acknowledge that glycolysis does not directly contribute to the proton motive force: Glycolysis occurs in the cytoplasm and produces pyruvate and ATP, but does not involve proton pumping.
Understand the Krebs cycle's role: While the Krebs cycle generates electron carriers (NADH and FADH2) that feed into the electron transport chain, it does not directly contribute to the proton motive force itself.
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