Photosynthesis Question 36

36. Electrons from excited chlorophyll molecule of photosystem II are accepted first by: [2008]

(a) Cytochrome-b

(b) Cytochrome-f

(c) Quinone

(d) Ferredoxin

Show Answer

Answer : c

Hints & Solution

(c) Electrons from excited chlorophyll molecule of photosystem II are accepted first by quinone. Photosystem II is a photosynthetic pigment system along with some electron carriers that are located in the appressed part of the grana thylakoids. Photosystem II has chlorophyll a, b and carotenoids. Other components of PS II are phaeophytin, plastoquinone $(PQ)$, cytochrome complex and blue coloured copper containing plastocyanin.