Evidence Supporting the Chemiosmotic Theory Includes All of the Following

Question

Evidence supporting the chemiosmotic theory includes all of the following except __________.
A) inhibitors of ATP synthesis have been shown to dissipate the proton gradient
B) mitochondria with disrupted membranes cannot synthesize ATP
C) ATP synthesis is depressed when mitochondrial swelling occurs as a result of osmotic changes
D) the pH of a weakly buffered suspension of mitochondria rises when O2added.
E) actively respiring mitochondria expel protons

Accepted Answer

The chemiosmotic theory posits that the proton gradient across the mitochondrial membrane is crucial for ATP synthesis. The addition of O₂ (a hypothetical substance) causing the pH to rise in a weakly buffered suspension does not directly support this theory, as it does not relate to the creation or use of a proton gradient for ATP synthesis.