which of the following sequences correctly represents the flow of electrons during photosynthesis?\nnadph→o2→…

which of the following sequences correctly represents the flow of electrons during photosynthesis?\nnadph→o2→co2\nh2o→nadph→calvin cycle\nh2o→photosystem i→photosystem ii\nnadph→electron transport chain→o2

which of the following sequences correctly represents the flow of electrons during photosynthesis?\nnadph→o2→co2\nh2o→nadph→calvin cycle\nh2o→photosystem i→photosystem ii\nnadph→electron transport chain→o2

Answer

Brief Explanations:

  • In photosynthesis, water ((H_2O)) is split in the light - dependent reactions. The electrons from (H_2O) are used to generate (NADPH).
  • The (NADPH) then donates its electrons to the Calvin cycle (light - independent reactions) for the reduction of (CO_2) to form organic compounds.
  • For the option (NADPH\rightarrow O_2\rightarrow CO_2): (NADPH) is an electron donor, not an electron acceptor from (O_2), and (O_2) is a by - product of the splitting of water, not a direct participant in this electron flow sequence as described in this option.
  • For the option (H_2O\rightarrow) photosystem (I\rightarrow) photosystem (II): In the light - dependent reactions, electrons flow from (H_2O) to photosystem (II) first, then to the electron transport chain, and then to photosystem (I).
  • For the option (NADPH\rightarrow) electron transport chain (\rightarrow O_2): (NADPH) is formed at the end of the non - cyclic electron flow (after the electron transport from photosystem (I)), and (O_2) is produced from the splitting of water, not from an electron flow that starts with (NADPH) as described here.

Answer:

(H2O\rightarrow NADPH\rightarrow Calvin\ cycle)