객관식
Which of the following diagrams correctly represents the reactants and products of photosynthesis?
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9. Photosynthesis
Introduction to Photosynthesis
객관식
In the context of photosynthesis, what is the largest source of electrons used to reduce NADP$^+$ to NADPH?
A
Oxygen (O\(_2\))
B
Carbon dioxide (CO\(_2\))
C
Glucose (C\(_6\)H\(_{12}\)O\(_6\))
D
Water (H\(_2\)O)
검증된 단계별 안내1
Understand the role of NADP$^+$ in photosynthesis: NADP$^+$ is an electron carrier that gets reduced to NADPH during the light-dependent reactions of photosynthesis. NADPH is then used in the Calvin cycle to help synthesize glucose.
Identify the source of electrons in the light-dependent reactions: Electrons are needed to reduce NADP$^+$ to NADPH. These electrons are provided by a molecule that undergoes oxidation during the process.
Recall the process of photolysis: In the light-dependent reactions, water (H\(_2\)O) is split into oxygen (O\(_2\)), protons (H$^+$), and electrons through a process called photolysis, which is driven by light energy absorbed by photosystem II.
Connect the electrons from water to NADP$^+$ reduction: The electrons released during the splitting of water are transferred through the electron transport chain, ultimately reducing NADP$^+$ to NADPH.
Conclude that water (H\(_2\)O) is the largest source of electrons: Among the options provided, water is the molecule that donates electrons during photosynthesis, making it the correct answer.
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