Question
Question: I. Water is oxidised in PS-I not in PS-II. II. Light is needed for both PS-I and PS-II. III. Due to ...
I. Water is oxidised in PS-I not in PS-II. II. Light is needed for both PS-I and PS-II. III. Due to photolysis of water, formation of ATP and NADPH occurs IV. Production of NADPH and H⁺ is associated with PS-II not PS-I. Identify the true statement and select the correct option.
A
I and II
B
II and III
C
I and IV
D
II and IV
Answer
II and III
Explanation
Solution
Minimal Explanation:
- I: False. Water is oxidized in PSII, not PSI.
- II: True. Both photosystems require light.
- III: True. Photolysis of water in PSII supplies electrons that lead to the formation of ATP and NADPH.
- IV: False. NADPH is produced by PSI, not PSII (though PSII does contribute protons).
Answer: Option (2) II and III