Which statement correctly describes photosystem II?
AIt transports electrons from water to the chain
BIt transports electrons from the chain to water
CIt transports electrons from NADPH to water
DIt transports electrons from sugar to the chain
Answer & Solution
Correct answer: A. It transports electrons from water to the chain
1. Photosystem II is an integral protein and pigment complex in the thylakoid membranes.
2. It transports electrons from water to the electron transport chain.
3. Oxygen is a product of photosystem II, which follows from splitting the water.
4. Reversing the direction would mean electrons flowing back onto water, which is the opposite of what happens.
_Source: OpenStax Biology (1st ed., CC BY 4.0), Ch 8 "Photosynthesis", section 8.2 The Light-Dependent Reactions of Photosynthesis_
Related questions
The light-independent reactions still depend on the light reactions because they need:Roughly what share of the oxygen produced in a leaf is used by the leaf's own mitochondriaLight of energy higher than blue damages pigment molecules in a process called:Bacteria that build sugars using energy from inorganic chemicals rather than light are:The coal and petroleum burned today store sunlight captured by photosynthesis roughly:How many turns of the Calvin cycle are needed before one G3P leaves it?The three-carbon carbohydrate that carbon dioxide is first fixed into is:The flow of hydrogen ions through ATP synthase is called: