Question

Differentiate between photoact - I and photoact - II.

Answer 1

Photo - act - I/ Pigment sytem - I	Photo - act - II / Pigment system - II
1. Its reaction centre is P - 700.	1. Its reaction centre is P - 680.
2. It is located on the outer surface of thylakoid.	2. It is located on the inner surface of thylakoid.
3. It involved both in cyclic and non - cyclic photophos phorylation.	3. It is involved only in non - cyclic photophosphory lation.
4. It receives electrons from I photo - act - II.	4. It receives electrons from photolysis of water.
5. Both wavelength of light, shorter and longer than 680 nm are absorbed by it.	5. Only wavelength of light, shorter than 680 nm are absorbed by it.
6. It gives electron to NADP.	6. It gives electron to P - 700.
7. In this, the amount of chlorophyll - b and carotenoid is less.	7. In this, the amount of chlorophyll - b and carotenoid is more.