Multiple Choice
How many turns of the Calvin cycle are required for a plant to synthesize one molecule of glucose?
1. A Review of General Chemistry
Intro to Organic Chemistry
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Which of the following statements is true regarding electron transfer in the electron-transport chain?
A
Electrons are transferred from oxygen to NADH and FADH2.
B
Electrons are transferred from ATP to ADP.
C
Electrons are transferred directly from glucose to oxygen.
D
Electrons are transferred from NADH and FADH2 to oxygen, forming water.
Verified step by step guidance1
Understand the role of the electron-transport chain: It is a series of complexes that transfer electrons from electron donors to electron acceptors via redox reactions, and couples this electron transfer with the transfer of protons (H+ ions) across a membrane.
Identify the main electron donors in the electron-transport chain: NADH and FADH2 are the primary electron carriers that donate electrons to the chain.
Recognize the final electron acceptor: Oxygen is the final electron acceptor in the electron-transport chain. It combines with electrons and protons to form water.
Clarify the direction of electron flow: Electrons flow from NADH and FADH2 through the electron-transport chain to oxygen. This flow is crucial for the production of ATP through oxidative phosphorylation.
Conclude with the correct statement: The correct statement is that electrons are transferred from NADH and FADH2 to oxygen, forming water, which is consistent with the function of the electron-transport chain in cellular respiration.
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