During photosynthesis in higher plants:
I: carbon dioxide is reduced.
II: oxygen is released.
III: the hydrogen carrier is NAD.

1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic:  Introduction | Photosynthetic Pigments | Light Reaction: Electron Transport | Dark Reaction: Biosynthetic Phase |
 56%
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.

In the process of photosynthesis, electrons lost by Photosystem II (PS II) must be continuously replaced. Considering the location and function of the water-splitting complex associated with PS II, where are the protons (H⁺) and oxygen (O₂) released?
1. Protons (H⁺) are released into the stroma, and O₂ is released into the lumen of the thylakoid.
2. Protons (H⁺) are released into the lumen of the thylakoid, and O₂ is released into the stroma.
3. Both protons (H⁺) and O₂ are released into the lumen of the thylakoid.
4. Both protons (H⁺) and O₂ are released into the stroma.
Subtopic:  Light Reaction: Electron Transport |
Level 3: 35%-60%
Please attempt this question first.
Hints
Please attempt this question first.