Multiple Choice
In oxidative phosphorylation, cells produce ATP most efficiently in the presence of which of the following conditions?
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Review 4: Amino Acid Oxidation, Oxidative Phosphorylation, & Photophosphorylation
Oxidative Phosphorylation 1
Multiple Choice
In oxidative phosphorylation, what type of molecule is ATP synthase?
A
A membrane-embedded enzyme complex (protein) that catalyzes ATP formation
B
A small-molecule electron carrier that shuttles electrons between complexes
C
A soluble kinase that phosphorylates ADP using substrate-level phosphorylation
D
A phospholipid that forms the inner mitochondrial membrane bilayer
Verified step by step guidance1
Understand the role of ATP synthase in oxidative phosphorylation: it is involved in the production of ATP by utilizing the proton gradient across the mitochondrial inner membrane.
Recall that ATP synthase is a protein complex embedded in the inner mitochondrial membrane, which allows protons to flow through it, driving the synthesis of ATP from ADP and inorganic phosphate.
Differentiate ATP synthase from other molecules involved in oxidative phosphorylation, such as electron carriers (which shuttle electrons) and kinases (which perform substrate-level phosphorylation).
Recognize that ATP synthase is not a small molecule or a phospholipid, but a large enzyme complex that spans the membrane and catalyzes ATP formation.
Conclude that ATP synthase is best described as a membrane-embedded enzyme complex (protein) that catalyzes ATP formation.
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