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Multiple Choice
What is the primary function of NADH and FADH2 in cellular metabolism?
A
They serve as substrates for ATP synthesis.
B
They act as electron carriers in the electron transport chain.
C
They are involved in the synthesis of fatty acids.
D
They function as coenzymes in glycolysis.
Verified step by step guidance
1
Understand the role of NADH and FADH2 in cellular metabolism: These molecules are crucial in the process of cellular respiration, specifically in the electron transport chain.
Recognize that NADH and FADH2 are produced during earlier stages of cellular respiration, such as glycolysis and the citric acid cycle, where they are reduced by gaining electrons.
Identify the electron transport chain as the stage in cellular respiration where NADH and FADH2 donate the electrons they have gained. This process occurs in the inner mitochondrial membrane.
Explain that the electrons transferred from NADH and FADH2 move through a series of protein complexes in the electron transport chain, releasing energy that is used to pump protons across the mitochondrial membrane, creating a proton gradient.
Conclude that the primary function of NADH and FADH2 is to act as electron carriers, facilitating the transfer of electrons to the electron transport chain, which ultimately leads to the production of ATP through oxidative phosphorylation.