PHOTOSYNTHESIS
LIGHT DEPENDENT REACTIONS
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Combine with another oxygen atom to produce oxygen gas
|
|
|
Remains in the thylakoid space to be used during ETC
|
|
|
To recover electron deficiency in photosystems
|
|
|
Used as final electron acceptor
|
Detailed explanation-1: -In non-cyclic photophosphorylation the photolysis of water produces electrons that generate a proton motive force which is used to produce ATP, the electrons finally being used to reduce NADP+ to NADPH.
Detailed explanation-2: -The electrons released from the photolysis of water are used to replace the electrons lost by the photosystem II. Photosystem II replaces the electrons that are lost by the photosystem I. Photosystem I provides the electrons for the production of NADPH.
Detailed explanation-3: -The light energy is used to split water in a process called photolysis, which replaces electrons that have moved from photosystem II. The correct answer is (D). The electrons become excited and move to a higher energy level, leaving photosystem II.
Detailed explanation-4: -Thus, the end products of the photolysis reaction are oxygen, NADPH and ATP.
Detailed explanation-5: -What happens to the electrons that are lost by photosystem I? Electrons in photosystem II are carried along an electron transport chain and replace electrons lost by photosystem I. Electrons from photosystem I are carried along a different electron transport chain and drive the synthesis of NADPH.