NEET2009BotanyPhotosynthesis in Higher PlantsActual
Which of the following is the characteristic of PS-I?
Options
- AIt is active only upto 680 ~nm of light.
- BThe reaction centre of PS-I is P ₆₈₀ .
- CPS-I is reduced by the electrons released in photolysis of water.
- DPS-I is involved in non-cyclic photophosphorylation.
Correct answer
D. PS-I is involved in non-cyclic photophosphorylation.
Step-by-step solution
Photosystem I is located in the nonappressed part of grana thylakoids as well as stroma thylakoids. In this photosystem chlorophyll : carotenoid content is high. Its photocentre is P ₇₀₀ . Pigment molecules of PS I absorb at or below 700 nm wavelenth of light. It receives electrons from photosystem II. Photosystem I is involved in both cyclic and non cyclic photophosphorylation. It is not connected with photolysis of water. Usually it hands over its electron to NADP ⁺ .