question_answer

The following (P to U) are the main steps of chemiosmotic ATP synthesis in the light reaction. Which answer places them in correct order?

P. \[P.\text{ }{{H}^{+}}\] concentration gradient established

Q. \[Q.\text{ }{{H}^{+}}\] diffuses through ATP synthetase

R. Carriers use energy from electrons to move I-T across the membrane

S. Electrons from PSII pass along electron transport chain

T. Light excites electrons in PSII

U. Energy of I-T flow is used by ATP synthetase to make ATP

A) P \[\to \]Q\[\to \]T\[\to \]S\[\to \]R\[\to \]U

B) S\[\to \]T\[\to \]P\[\to \]Q\[\to \]R\[\to \]U

C) T\[\to \]S\[\to \]R\[\to \]P\[\to \]Q\[\to \]U

D) T\[\to \]S\[\to \]R\[\to \]U\[\to \]Q\[\to \]P