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Multiple Choice
What is the primary purpose of NADH and FADH2 in cellular metabolism?
A
To act as electron carriers in the electron transport chain
B
To provide structural support to cellular membranes
C
To catalyze the breakdown of glucose in glycolysis
D
To store energy in the form of ATP
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 function as electron carriers.
In the electron transport chain, NADH and FADH2 donate electrons, which are transferred through a series of proteins embedded in the inner mitochondrial membrane.
The transfer of electrons through the electron transport chain leads to the pumping of protons across the mitochondrial membrane, creating a proton gradient.
This proton gradient is used by ATP synthase to produce ATP, the energy currency of the cell, highlighting the role of NADH and FADH2 in energy production rather than structural support or direct ATP storage.