Question

Which of the following sequences correctly represents the flow of electrons during photosynthesis?
A. NADPH -> O2 -> CO2
B. H2O -> NADPH -> Calvin cycle
C. NADPH -> chlorophyll -> Calvin cycle
D. H2O -> photosystem I -> photosystem II
E. NADPH -> electron transport chain -> O2

Answer 1

Answer:

H2O -> NADPH -> Calvin cycle - B.

Answer 2

The sequence that correctly represents the flow of electrons during photosynthesis is: B. H2O -> NADPH -> Calvin cycle.

Photosynthesis can be defined as a natural process through which autotrophs (green plants), transform light energy (sunlight) into chemical energy by using carbon dioxide ($CO_2$) and water ($H_2O$) during cellular respiration.

Basically, both carbon dioxide ($CO_2$), sunlight, and water ($H_2O$) contained in the Earth's atmosphere plays a significant role in photosynthesis because they serve as an input.

During photosynthesis, the electrons start at a low energy level in water ($H_2O$) before they are excited to a very high energy level by light and then transported to NADPH.

Finally, NADPH arrives at the Calvin cycle, where its electrons would be used to build sugars from carbon dioxide ($CO_2$).

In conclusion, the sequence that correctly represents the flow of electrons during photosynthesis is H2O -> NADPH -> Calvin cycle.

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