Question

Which of the following sequences correctly represents the flow of electrons during photosynthesis?

A) NADPH → ATP → Water → CO₂
B) CO₂ → Water → ATP → NADPH
C) Water → CO₂ → NADPH → ATP
D) ATP → NADPH → CO₂ → Water

Answer 1

The flow of electrons during photosynthesis starts with water and ends with ATP.

Step-by-step explanation:

The correct sequence that represents the flow of electrons during photosynthesis is C) Water → CO₂ → NADPH → ATP.

In photosynthesis, light excites electrons in photosystem II (PSII) which are then passed through an electron transport chain (ETC). As the electrons travel, water is split, supplying new electrons to replace those that are lost. This results in the formation of NADPH and ATP, which are energy-rich molecules used in the Calvin cycle to produce glucose.

Overall, the flow of electrons in photosynthesis starts with water, followed by CO₂, then NADPH, and finally ATP.