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15. Plants dissipate excess excitation light energy as heat so as to protect from photo-oxidative damage. The mechanism is known as (1) Photo chemical quenching (2) Non Photochemical quenching (3) […]

14. Thylakoid membrane has lateral asymmetrical positioning of photosystem in chloroplast. Which statement is correct for distribution of PS-I and PS-II? (1) PS-I in no appressed portion and PS-II in […]

Among the following which mineral plays an important role in photolysis of water? (1) Mg++ (2) Ca++ (3) Na+ (4) Mn++                 The mineral […]

12. Which mineral ion play important role in photolysis of water associated with photosystem II? (1) Manganese     (2) Magnesium (3) Iron                  (4) Molybdenum The mineral ion that plays an […]

11. Essential component of chloroplast photosynthetic apparatus for photosynthesis is coded by (1) Nuclear gene (2) Chloroplast gene (3) Nuclear and chloroplast gene (4) Chloroplast and mitochondrial genes The essential […]

10. Which ion gradient is formed across the thylakoid membrane, if a light is incident on isolated thylakoid? (1) H+                               (2) Na+ (3) Both Na+ and H+          (4) Cl– […]

9. The role of carrier proteins in light reaction is- (1) To transfer energetic electrons from PSII to PSI. (2) Pumping of Protons (3) Formation of ATP (4) Transferring of […]

8 Electrons excited from PS II are accepted by- (1) PQ                    (2) Pheophytin (3) PC                   (4) Cyt b6 Electron Acceptance in Photosystem II Introduction Key phrase: electron acceptor after […]

The major difference in PS-I and PS-il found in Chloroplast are (1) Position on grana (2) Chlorophyll a (3) Position of electron carriers (4) Light harvesting Major Differences Between PSI […]

6 DCMU effects the photosynthesis by attacking at (1) Ps I         (2) PS II (3) PC          (4) Cyt b-f6 DCMU Effects on Photosynthesis: Target Site Introduction Key phrase: DCMU inhibits […]