“We make a living by what we get, but we make a life by what we give.” – Winston Churchill
Set Your Priorities
Tuesday, December 24, 2013
The excitation of chlorophyll by light energy initiates a chain of events that leads to ATP production.
The chemiosmotic hypothesis states that the flow of electrons through an electron transport chain generates a proton gradient that leads to the synthesis of ATP.
A proton gradient across chloroplast and mitochondrial membranes drives ATP synthesis by the enzyme ATP synthase.
The channels formed by ATP synthase are specific for protons.
The region of ATP synthase that catalyzes ATP production protrudes out of, but does not span, the chloroplast membrane; the region that spans the membrane is an ion channel through which protons can pass.
This statement is true; although the proton gradient is present, ADP and inorganic phosphate are required to make ATP and were not added to the reaction.