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What role does water play in the light reactions?
What role does water play in the light reactions?
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Practice Questions
1 question
Q1
What role does water play in the light reactions?
It absorbs light
It provides electrons
It fixes carbon
It produces glucose
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Water provides electrons through the process of photolysis during the light reactions.
Questions & Step-by-step Solutions
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Q
Q: What role does water play in the light reactions?
Solution:
Water provides electrons through the process of photolysis during the light reactions.
Steps: 5
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Step 1: Understand that light reactions occur in the chloroplasts of plant cells.
Step 2: Know that light energy from the sun is absorbed by chlorophyll, a green pigment in plants.
Step 3: Realize that this absorbed light energy is used to split water molecules (H2O) in a process called photolysis.
Step 4: Learn that when water is split, it releases electrons, which are essential for the light reactions to continue.
Step 5: Remember that these electrons help create energy-rich molecules (ATP and NADPH) that are used in the next stage of photosynthesis.
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