What is the role of water in the light-dependent reactions?
Correct Answer: Water acts as an electron donor in the light-dependent reactions, leading to the production of oxygen.
- Step 1: Understand that light-dependent reactions occur in the chloroplasts of plant cells when sunlight is available.
- Step 2: Know that water (H2O) is one of the key ingredients needed for these reactions.
- Step 3: Realize that when light hits the chlorophyll (the green pigment in plants), it energizes the chlorophyll.
- Step 4: This energy is used to split water molecules into oxygen, protons, and electrons.
- Step 5: The electrons from the split water molecules are then used to help create energy-rich molecules like ATP and NADPH.
- Step 6: As a result of this process, oxygen is released as a byproduct into the atmosphere.
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