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Multiple Choice
Why is water an essential ingredient for photosynthesis in organic chemistry?
A
Water is the primary source of carbon atoms for glucose synthesis.
B
Water provides electrons through photolysis, which are necessary for the light-dependent reactions.
C
Water acts as a catalyst in the Calvin cycle.
D
Water is used to transport glucose out of the chloroplast.
Verified step by step guidance
1
Understand the role of water in photosynthesis: Water is crucial in the light-dependent reactions of photosynthesis, where it undergoes photolysis.
Explore photolysis: During photolysis, water molecules are split into oxygen, protons, and electrons. This process is driven by light energy absorbed by chlorophyll.
Identify the importance of electrons: The electrons released from water are essential for the electron transport chain in the light-dependent reactions, which ultimately leads to the production of ATP and NADPH.
Clarify the misconception: Water is not the primary source of carbon atoms for glucose synthesis; carbon dioxide is. Water's role is primarily in providing electrons and protons.
Summarize the correct answer: Water provides electrons through photolysis, which are necessary for the light-dependent reactions, supporting the synthesis of energy carriers used in the Calvin cycle.