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Multiple Choice
Which process provides the energy used to synthesize ATP from ADP?
A
Photosynthesis
B
Fermentation
C
Glycolysis
D
Oxidative phosphorylation
Verified step by step guidance
1
Understand the role of ATP (adenosine triphosphate) in cellular energy transfer. ATP is the primary energy carrier in cells, and its synthesis from ADP (adenosine diphosphate) is crucial for energy storage.
Recognize that oxidative phosphorylation is a metabolic pathway that uses energy released by the oxidation of nutrients to produce ATP. This process occurs in the mitochondria of eukaryotic cells.
Identify the electron transport chain (ETC) as a series of protein complexes located in the inner mitochondrial membrane. Electrons are transferred through these complexes, releasing energy.
Explain how the energy released during electron transfer is used to pump protons (H⁺ ions) across the mitochondrial membrane, creating a proton gradient (also known as the proton motive force).
Describe how ATP synthase, an enzyme embedded in the mitochondrial membrane, uses the energy from the proton gradient to catalyze the conversion of ADP and inorganic phosphate (Pi) into ATP, completing the process of oxidative phosphorylation.