Which letter in the diagram represents water?
Which letter represents the ultimate electron acceptor in photosynthesis?
At the end of photosynthesis, which molecule contains the most high-energy electrons?
'B' is oxygen gas.
'B' is the ultimate electron donor in photosynthesis.
The arrow at 'C' represents the movement of electrons across the thylakoid membrane.
'D' represents Photosystem I (P700).
'E' is an enzyme that catalyzes an oxidation-reduction reaction.
'F' will usually leave the chloroplast and move into the cytoplasm of the plant cell.
'G' will be oxidized in the Calvin Cycle.
'A' is the region of lowest hydrogen ion concentration in the chloroplast.
'A' will be oxidized in the process shown in this diagram.
'B' is an enzyme called PEP carboxylase.
The reaction catalyzed by the enzyme 'B' is a carbon fixation reaction.
'C' and 'D' are products of the light reactions.
'C' and 'D' are both oxidized in the reactions shown.
'E' is a carbohydrate.
The fixation of carbon dioxide takes place in __________________ and results in the synthesis of ___________________.
the thylakoid space; ATP
the matrix; carbohydrates
the stroma; carbohydrates
What is the role of the antenna (accessory) pigments found in the thylakoid membranes of chloroplasts?
They transfer energized electrons to chlorophyll a
To absorb wavelengths of light other than those absorbed by chlorophyll a, and to transfer that energy to chlorophyll a
To perform carbon fixation in the Calvin Cycle
To move hydrogen ions across the thylakoid membrane to allow for the establishment of a hydrogen ion gradient
What would be the most direct effect of a substance that makes the thylakoid membrane totally permeable to hydrogen ions?
The rate of electron flow would decrease.
The rate of NADPH synthesis would increase.
The rate of oxygen production would increase.
The rate of ATP synthesis would decrease.